diff --git a/src/main/java/de/kosit/validationtool/api/InputFactory.java b/src/main/java/de/kosit/validationtool/api/InputFactory.java
index 5339cf1..bcf0e87 100644
--- a/src/main/java/de/kosit/validationtool/api/InputFactory.java
+++ b/src/main/java/de/kosit/validationtool/api/InputFactory.java
@@ -191,6 +191,7 @@ public class InputFactory {
      * @param name the digest algorithm
      * @return an {@link Input}
      */
+    @SuppressWarnings("unused")
     public static Input read(final Source source, final String name) {
         checkNotEmpty(name);
         return read(source, name, PSEUDO_NAME_ALGORITHM, name.getBytes());
diff --git a/src/main/java/de/kosit/validationtool/api/XmlError.java b/src/main/java/de/kosit/validationtool/api/XmlError.java
index 7b67ceb..47dfb81 100644
--- a/src/main/java/de/kosit/validationtool/api/XmlError.java
+++ b/src/main/java/de/kosit/validationtool/api/XmlError.java
@@ -36,6 +36,7 @@ public interface XmlError {
      * @return der Schweregrad
      * @see Severity
      */
+    @SuppressWarnings("unused")
     Severity getSeverity();
 
     /**
@@ -53,7 +54,9 @@ public interface XmlError {
     Integer getColumnNumber();
 
     enum Severity {
-        SEVERITY_WARNING, SEVERITY_ERROR, SEVERITY_FATAL_ERROR
+        @SuppressWarnings("unused")
+        SEVERITY_WARNING, SEVERITY_ERROR, @SuppressWarnings("unused")
+        SEVERITY_FATAL_ERROR
     }
 
 }
diff --git a/src/main/java/de/kosit/validationtool/cmd/CheckAssertionAction.java b/src/main/java/de/kosit/validationtool/cmd/CheckAssertionAction.java
index 1970a6e..91b6dcb 100644
--- a/src/main/java/de/kosit/validationtool/cmd/CheckAssertionAction.java
+++ b/src/main/java/de/kosit/validationtool/cmd/CheckAssertionAction.java
@@ -97,7 +97,7 @@ class CheckAssertionAction implements CheckAction {
 
     }
 
-    private XPathSelector createSelector(AssertionType assertion) throws SaxonApiException {
+    private XPathSelector createSelector(AssertionType assertion) {
         try {
             final XPathCompiler compiler = getProcessor().newXPathCompiler();
             assertions.getNamespace().forEach(ns -> compiler.declareNamespace(ns.getPrefix(), ns.getValue()));
diff --git a/src/main/java/de/kosit/validationtool/cmd/CommandLineApplication.java b/src/main/java/de/kosit/validationtool/cmd/CommandLineApplication.java
index 588b88e..98062bf 100644
--- a/src/main/java/de/kosit/validationtool/cmd/CommandLineApplication.java
+++ b/src/main/java/de/kosit/validationtool/cmd/CommandLineApplication.java
@@ -94,16 +94,22 @@ public class CommandLineApplication {
         return resultStatus;
     }
 
-    private static int logExecutionException(final Exception ex, final CommandLine cli, final ParseResult parseResult) {
+    @SuppressWarnings("SameReturnValue")
+    private static int logExecutionException(final Exception ex, @SuppressWarnings("unused") final CommandLine cli,
+            @SuppressWarnings("unused") final ParseResult parseResult) {
         final String message = isNotEmpty(ex.getMessage()) ? ex.getMessage() : "Es ist eine Fehler aufgetreten";
         Printer.writeErr(ex, message);
         return 1;
     }
 
+    @SuppressWarnings("unused")
     enum Level {
-
-        INFO, WARN, DEBUG, TRACE, ERROR, OFF
-
+        @SuppressWarnings("unused")
+        INFO, @SuppressWarnings("unused")
+        WARN, @SuppressWarnings("unused")
+        DEBUG, @SuppressWarnings("unused")
+        TRACE, @SuppressWarnings("unused")
+        ERROR, @SuppressWarnings("unused")
+        OFF
     }
-
 }
diff --git a/src/main/java/de/kosit/validationtool/cmd/CommandLineOptions.java b/src/main/java/de/kosit/validationtool/cmd/CommandLineOptions.java
index 484948c..8bad1fa 100644
--- a/src/main/java/de/kosit/validationtool/cmd/CommandLineOptions.java
+++ b/src/main/java/de/kosit/validationtool/cmd/CommandLineOptions.java
@@ -35,8 +35,7 @@ import java.util.concurrent.Callable;
  *
  * @author Andreas Penski
  */
-@Command(description = "Structural and semantic validation of xml files", name = "KoSIT Validator", mixinStandardHelpOptions = false,
-         separator = " ")
+@Command(description = "Structural and semantic validation of xml files", name = "KoSIT Validator", separator = " ")
 @Getter
 public class CommandLineOptions implements Callable<ReturnValue> {
 
@@ -166,7 +165,7 @@ public class CommandLineOptions implements Callable<ReturnValue> {
     private List<ScenarioDefinition> scenarios;
 
     @Override
-    public ReturnValue call() throws Exception {
+    public ReturnValue call() {
         configureLogging(this);
         return Validator.mainProgram(this);
     }
diff --git a/src/main/java/de/kosit/validationtool/cmd/TypeConverter.java b/src/main/java/de/kosit/validationtool/cmd/TypeConverter.java
index 96e67d0..3210d58 100644
--- a/src/main/java/de/kosit/validationtool/cmd/TypeConverter.java
+++ b/src/main/java/de/kosit/validationtool/cmd/TypeConverter.java
@@ -76,7 +76,7 @@ class TypeConverter {
     public static class RepositoryConverter implements ITypeConverter<RepositoryDefinition> {
 
         @Override
-        public RepositoryDefinition convert(final String value) throws Exception {
+        public RepositoryDefinition convert(final String value) {
             return TypeConverter.convert(RepositoryDefinition.class, value);
         }
     }
@@ -89,7 +89,7 @@ class TypeConverter {
     public static class ScenarioConverter implements ITypeConverter<ScenarioDefinition> {
 
         @Override
-        public ScenarioDefinition convert(final String value) throws Exception {
+        public ScenarioDefinition convert(final String value) {
             return TypeConverter.convert(ScenarioDefinition.class, value);
         }
     }
diff --git a/src/main/java/de/kosit/validationtool/cmd/Validator.java b/src/main/java/de/kosit/validationtool/cmd/Validator.java
index 1b391f7..eca7f09 100644
--- a/src/main/java/de/kosit/validationtool/cmd/Validator.java
+++ b/src/main/java/de/kosit/validationtool/cmd/Validator.java
@@ -320,6 +320,7 @@ public class Validator {
 
     }
 
+    @SuppressWarnings("SameParameterValue")
     private static void assertFileExistance(final Path f, final String type) {
         if (!Files.isRegularFile(f)) {
             throw new IllegalArgumentException(
diff --git a/src/main/java/de/kosit/validationtool/cmd/report/Format.java b/src/main/java/de/kosit/validationtool/cmd/report/Format.java
index 6d5141f..58ad531 100644
--- a/src/main/java/de/kosit/validationtool/cmd/report/Format.java
+++ b/src/main/java/de/kosit/validationtool/cmd/report/Format.java
@@ -68,6 +68,7 @@ public class Format {
      *
      * @return this {@link Format}
      */
+    @SuppressWarnings("unused")
     public Format color(final Code textColor) {
         this.textColor = textColor;
         return this;
@@ -80,6 +81,7 @@ public class Format {
      *
      * @return this {@link Format}
      */
+    @SuppressWarnings("unused")
     public Format background(final Code color) {
         this.background = color;
         return this;
diff --git a/src/main/java/de/kosit/validationtool/cmd/report/Grid.java b/src/main/java/de/kosit/validationtool/cmd/report/Grid.java
index c0a9ed7..d43c257 100644
--- a/src/main/java/de/kosit/validationtool/cmd/report/Grid.java
+++ b/src/main/java/de/kosit/validationtool/cmd/report/Grid.java
@@ -61,6 +61,7 @@ public class Grid {
          *
          * @param name the name of the column
          */
+        @SuppressWarnings("unused")
         public ColumnDefinition(final String name) {
             this(name, -1, -1, 1);
         }
@@ -147,6 +148,7 @@ public class Grid {
             this.text.add(txt);
         }
 
+        @SuppressWarnings("unused")
         public Cell(final Object object, final Code... codes) {
             this(new Text(object, codes));
         }
@@ -192,6 +194,7 @@ public class Grid {
 
         }
 
+        @SuppressWarnings("unused")
         public Cell add(final Object object, final Code... codes) {
             this.text.add(new Text(object, codes));
             return this;
@@ -237,6 +240,7 @@ public class Grid {
      * @param def definitions
      * @return this grid
      */
+    @SuppressWarnings("unused")
     public Grid addColumn(final ColumnDefinition def) {
         this.definitions.add(def);
         return this;
@@ -263,6 +267,7 @@ public class Grid {
         return this;
     }
 
+    @SuppressWarnings("unused")
     public Grid addCell(final Text... text) {
         return addCell(new Cell(Arrays.asList(text)));
     }
@@ -274,6 +279,7 @@ public class Grid {
         return addCell(new Cell(t));
     }
 
+    @SuppressWarnings("UnusedReturnValue")
     public Grid addCell(final Object cell) {
         return addCell(cell, DEFAULT_FORMAT.getTextColor());
     }
diff --git a/src/main/java/de/kosit/validationtool/cmd/report/Justify.java b/src/main/java/de/kosit/validationtool/cmd/report/Justify.java
index bd7180a..2a44df1 100644
--- a/src/main/java/de/kosit/validationtool/cmd/report/Justify.java
+++ b/src/main/java/de/kosit/validationtool/cmd/report/Justify.java
@@ -39,8 +39,10 @@ public enum Justify {
             return StringUtils.center(string, length);
         }
     },
+    @SuppressWarnings("unused")
     RIGHT {
 
+        @SuppressWarnings("unused")
         @Override
         public String apply(final String string, final int length) {
             return StringUtils.leftPad(string, length);
diff --git a/src/main/java/de/kosit/validationtool/cmd/report/Line.java b/src/main/java/de/kosit/validationtool/cmd/report/Line.java
index 0416575..5e43c8d 100644
--- a/src/main/java/de/kosit/validationtool/cmd/report/Line.java
+++ b/src/main/java/de/kosit/validationtool/cmd/report/Line.java
@@ -71,6 +71,7 @@ public class Line {
         return add(new Text(text, codes));
     }
 
+    @SuppressWarnings("UnusedReturnValue")
     public Line add(final Object text, final Format format) {
         return add(new Text(text, format));
     }
@@ -107,6 +108,7 @@ public class Line {
         return this.texts.stream().mapToInt(Text::getLength).sum();
     }
 
+    @SuppressWarnings("unused")
     public static String render(final String text, final Code... codes) {
         return new Line().add(text, codes).render();
     }
diff --git a/src/main/java/de/kosit/validationtool/config/Builder.java b/src/main/java/de/kosit/validationtool/config/Builder.java
index 948ef21..eb33bc4 100644
--- a/src/main/java/de/kosit/validationtool/config/Builder.java
+++ b/src/main/java/de/kosit/validationtool/config/Builder.java
@@ -32,5 +32,6 @@ interface Builder<T> {
      * @param repository the {@link ContentRepository}
      * @return the result of building the object
      */
+    @SuppressWarnings("unused")
     Result<T, String> build(ContentRepository repository);
 }
diff --git a/src/main/java/de/kosit/validationtool/config/ConfigurationBuilder.java b/src/main/java/de/kosit/validationtool/config/ConfigurationBuilder.java
index 12b26b3..822694c 100644
--- a/src/main/java/de/kosit/validationtool/config/ConfigurationBuilder.java
+++ b/src/main/java/de/kosit/validationtool/config/ConfigurationBuilder.java
@@ -174,6 +174,7 @@ public class ConfigurationBuilder {
      *
      * @return a fallback configuration
      */
+    @SuppressWarnings("unused")
     public static FallbackBuilder defaultFallback() {
         throw new NotImplementedException("Not yet defined");
     }
@@ -193,6 +194,7 @@ public class ConfigurationBuilder {
      *
      * @return a configuration builder for schema
      */
+    @SuppressWarnings("unused")
     public static SchemaBuilder schema() {
         return new SchemaBuilder();
     }
@@ -204,6 +206,7 @@ public class ConfigurationBuilder {
      * @param schema the actual precompiled schema to use
      * @return a configuration builder for schema
      */
+    @SuppressWarnings("unused")
     public static SchemaBuilder schema(final String name, final Schema schema) {
         return new SchemaBuilder().name(name).schema(schema);
     }
@@ -243,6 +246,7 @@ public class ConfigurationBuilder {
      *
      * @return the scenario configuration builder
      */
+    @SuppressWarnings("unused")
     public static ScenarioBuilder scenario() {
         return scenario(null);
     }
@@ -350,6 +354,7 @@ public class ConfigurationBuilder {
      * @param strategy the strategy
      * @return this
      */
+    @SuppressWarnings("unused")
     public ConfigurationBuilder resolvingStrategy(final ResolvingConfigurationStrategy strategy) {
         this.resolvingConfigurationStrategy = strategy;
         return this;
@@ -372,6 +377,7 @@ public class ConfigurationBuilder {
      * @param repository the repository location
      * @return this
      */
+    @SuppressWarnings("unused")
     public ConfigurationBuilder useRepository(final Path repository) {
         return useRepository(repository.toUri());
     }
diff --git a/src/main/java/de/kosit/validationtool/config/ConfigurationLoader.java b/src/main/java/de/kosit/validationtool/config/ConfigurationLoader.java
index 798db4f..151299f 100644
--- a/src/main/java/de/kosit/validationtool/config/ConfigurationLoader.java
+++ b/src/main/java/de/kosit/validationtool/config/ConfigurationLoader.java
@@ -222,6 +222,7 @@ public class ConfigurationLoader {
      * @param value the parameter value object
      * @return this
      */
+    @SuppressWarnings("unused")
     public ConfigurationLoader addParameter(final String name, final Object value) {
         this.parameters.put(name, value);
         return this;
diff --git a/src/main/java/de/kosit/validationtool/config/FallbackBuilder.java b/src/main/java/de/kosit/validationtool/config/FallbackBuilder.java
index 71151e7..f616dc6 100644
--- a/src/main/java/de/kosit/validationtool/config/FallbackBuilder.java
+++ b/src/main/java/de/kosit/validationtool/config/FallbackBuilder.java
@@ -84,6 +84,7 @@ public class FallbackBuilder implements Builder<Scenario> {
      * @param source the source
      * @return this
      */
+    @SuppressWarnings("unused")
     public FallbackBuilder source(final URI source) {
         this.internal.source(source);
         return this;
@@ -96,6 +97,7 @@ public class FallbackBuilder implements Builder<Scenario> {
      * @param source the source
      * @return this
      */
+    @SuppressWarnings("unused")
     public FallbackBuilder source(final Path source) {
         this.internal.source(source);
         return this;
diff --git a/src/main/java/de/kosit/validationtool/config/ReportBuilder.java b/src/main/java/de/kosit/validationtool/config/ReportBuilder.java
index 8158037..6901173 100644
--- a/src/main/java/de/kosit/validationtool/config/ReportBuilder.java
+++ b/src/main/java/de/kosit/validationtool/config/ReportBuilder.java
@@ -112,6 +112,7 @@ public class ReportBuilder implements Builder<Pair<CreateReportType, Transformat
      * @param source the source
      * @return this
      */
+    @SuppressWarnings("UnusedReturnValue")
     public ReportBuilder source(final Path source) {
         return source(source.toUri());
     }
diff --git a/src/main/java/de/kosit/validationtool/config/SchematronBuilder.java b/src/main/java/de/kosit/validationtool/config/SchematronBuilder.java
index 0513777..ecbe5f7 100644
--- a/src/main/java/de/kosit/validationtool/config/SchematronBuilder.java
+++ b/src/main/java/de/kosit/validationtool/config/SchematronBuilder.java
@@ -112,6 +112,7 @@ public class SchematronBuilder implements Builder<Pair<ValidateWithSchematron, T
      * @param source the source
      * @return this
      */
+    @SuppressWarnings("unused")
     public SchematronBuilder source(final Path source) {
         return source(source.toUri());
     }
diff --git a/src/main/java/de/kosit/validationtool/impl/CollectingErrorEventHandler.java b/src/main/java/de/kosit/validationtool/impl/CollectingErrorEventHandler.java
index cd82167..95e6af7 100644
--- a/src/main/java/de/kosit/validationtool/impl/CollectingErrorEventHandler.java
+++ b/src/main/java/de/kosit/validationtool/impl/CollectingErrorEventHandler.java
@@ -24,7 +24,6 @@ import lombok.Getter;
 import net.sf.saxon.s9api.MessageListener;
 import net.sf.saxon.s9api.XdmNode;
 import org.xml.sax.ErrorHandler;
-import org.xml.sax.SAXException;
 import org.xml.sax.SAXParseException;
 
 import javax.xml.transform.ErrorListener;
@@ -112,17 +111,17 @@ public class CollectingErrorEventHandler implements ValidationEventHandler, Erro
     }
 
     @Override
-    public void warning(final SAXParseException exception) throws SAXException {
+    public void warning(final SAXParseException exception) {
         this.errors.add(createError(XMLSyntaxErrorSeverity.SEVERITY_WARNING, exception));
     }
 
     @Override
-    public void error(final SAXParseException exception) throws SAXException {
+    public void error(final SAXParseException exception) {
         this.errors.add(createError(XMLSyntaxErrorSeverity.SEVERITY_ERROR, exception));
     }
 
     @Override
-    public void fatalError(final SAXParseException exception) throws SAXException {
+    public void fatalError(final SAXParseException exception) {
         this.errors.add(createError(XMLSyntaxErrorSeverity.SEVERITY_FATAL_ERROR, exception));
     }
 
@@ -139,17 +138,17 @@ public class CollectingErrorEventHandler implements ValidationEventHandler, Erro
     }
 
     @Override
-    public void warning(final TransformerException exception) throws TransformerException {
+    public void warning(final TransformerException exception) {
         this.errors.add(createError(XMLSyntaxErrorSeverity.SEVERITY_WARNING, exception));
     }
 
     @Override
-    public void error(final TransformerException exception) throws TransformerException {
+    public void error(final TransformerException exception) {
         this.errors.add(createError(XMLSyntaxErrorSeverity.SEVERITY_ERROR, exception));
     }
 
     @Override
-    public void fatalError(final TransformerException exception) throws TransformerException {
+    public void fatalError(final TransformerException exception) {
         this.errors.add(createError(XMLSyntaxErrorSeverity.SEVERITY_FATAL_ERROR, exception));
     }
 
diff --git a/src/main/java/de/kosit/validationtool/impl/DefaultResult.java b/src/main/java/de/kosit/validationtool/impl/DefaultResult.java
index 69264b9..a18d9a2 100644
--- a/src/main/java/de/kosit/validationtool/impl/DefaultResult.java
+++ b/src/main/java/de/kosit/validationtool/impl/DefaultResult.java
@@ -145,6 +145,7 @@ public class DefaultResult implements Result {
         return filterSchematronResult(FailedAssert.class);
     }
 
+    @SuppressWarnings("SameParameterValue")
     private <T> List<T> filterSchematronResult(final Class<T> type) {
         return getSchematronResult() != null
                 ? getSchematronResult().stream().flatMap(e -> e.getActivePatternAndFiredRuleAndFailedAssert().stream())
diff --git a/src/main/java/de/kosit/validationtool/impl/HtmlExtractor.java b/src/main/java/de/kosit/validationtool/impl/HtmlExtractor.java
index 60b03a0..64a7234 100644
--- a/src/main/java/de/kosit/validationtool/impl/HtmlExtractor.java
+++ b/src/main/java/de/kosit/validationtool/impl/HtmlExtractor.java
@@ -71,6 +71,7 @@ public class HtmlExtractor {
         return this.executable.load();
     }
 
+    @SuppressWarnings("SameParameterValue")
     private XPathExecutable createXPath(final String expression, final Map<String, String> namespaces) {
         try {
             final XPathCompiler compiler = this.processor.newXPathCompiler();
diff --git a/src/main/java/de/kosit/validationtool/impl/ResolvingMode.java b/src/main/java/de/kosit/validationtool/impl/ResolvingMode.java
index 194de34..3164954 100644
--- a/src/main/java/de/kosit/validationtool/impl/ResolvingMode.java
+++ b/src/main/java/de/kosit/validationtool/impl/ResolvingMode.java
@@ -38,10 +38,12 @@ public enum ResolvingMode {
 
     },
 
+    @SuppressWarnings("unused")
     STRICT_LOCAL(new StrictLocalResolvingStrategy()),
 
     ALLOW_REMOTE(new RemoteResolvingStrategy()),
 
+    @SuppressWarnings("unused")
     CUSTOM(null);
 
     @Getter
diff --git a/src/main/java/de/kosit/validationtool/impl/input/LazyReadInput.java b/src/main/java/de/kosit/validationtool/impl/input/LazyReadInput.java
index f2c1760..e3afb50 100644
--- a/src/main/java/de/kosit/validationtool/impl/input/LazyReadInput.java
+++ b/src/main/java/de/kosit/validationtool/impl/input/LazyReadInput.java
@@ -40,6 +40,7 @@ interface LazyReadInput {
      *
      * @return true when computed
      */
+    @SuppressWarnings("unused")
     boolean isHashcodeComputed();
 
     /**
diff --git a/src/main/java/de/kosit/validationtool/impl/input/SourceInput.java b/src/main/java/de/kosit/validationtool/impl/input/SourceInput.java
index 2ea0c3d..0c6ffea 100644
--- a/src/main/java/de/kosit/validationtool/impl/input/SourceInput.java
+++ b/src/main/java/de/kosit/validationtool/impl/input/SourceInput.java
@@ -58,6 +58,7 @@ public final class SourceInput extends AbstractInput {
 
     private final String digestAlgorithm;
 
+    @SuppressWarnings("unused")
     public SourceInput(final StreamSource source, final String name, final String digestAlgorithm) {
         this(source, name, digestAlgorithm, null);
     }
@@ -99,7 +100,7 @@ public final class SourceInput extends AbstractInput {
         return isStreamSource();
     }
 
-    private boolean isConsumed() throws IOException {
+    private boolean isConsumed() {
         if (isStreamSource()) {
 
             final StreamSource ss = (StreamSource) this.source;
diff --git a/src/main/java/de/kosit/validationtool/impl/model/Result.java b/src/main/java/de/kosit/validationtool/impl/model/Result.java
index a120c9a..7ead20c 100644
--- a/src/main/java/de/kosit/validationtool/impl/model/Result.java
+++ b/src/main/java/de/kosit/validationtool/impl/model/Result.java
@@ -37,6 +37,7 @@ public class Result<T, E> {
 
     private T object;
 
+    @SuppressWarnings("CanBeFinal")
     private Collection<E> errors = new ArrayList<>();
 
     /**
diff --git a/src/main/java/de/kosit/validationtool/impl/tasks/CreateReportAction.java b/src/main/java/de/kosit/validationtool/impl/tasks/CreateReportAction.java
index 2c274ce..9be4622 100644
--- a/src/main/java/de/kosit/validationtool/impl/tasks/CreateReportAction.java
+++ b/src/main/java/de/kosit/validationtool/impl/tasks/CreateReportAction.java
@@ -138,7 +138,7 @@ public class CreateReportAction implements CheckAction {
         }
 
         @Override
-        public boolean getFeature(final String name) throws SAXNotRecognizedException, SAXNotSupportedException {
+        public boolean getFeature(final String name) {
             if (SAX_FEATURES_NAMESPACES.equals(name)) {
                 return true;
             } else if (SAX_FEATURES_NAMESPACE_PREFIXES.equals(name)) {
@@ -149,7 +149,7 @@ public class CreateReportAction implements CheckAction {
         }
 
         @Override
-        public void setFeature(final String name, final boolean value) throws SAXNotRecognizedException, SAXNotSupportedException {
+        public void setFeature(final String name, final boolean value) throws SAXNotRecognizedException {
             // this inverts the logic from JaxbSource pseude parser
             if (name.equals(SAX_FEATURES_NAMESPACES) && !value) {
                 throw new SAXNotRecognizedException(name);
diff --git a/src/main/java/de/kosit/validationtool/impl/xml/BaseResolvingStrategy.java b/src/main/java/de/kosit/validationtool/impl/xml/BaseResolvingStrategy.java
index 5b0146c..a850e1d 100644
--- a/src/main/java/de/kosit/validationtool/impl/xml/BaseResolvingStrategy.java
+++ b/src/main/java/de/kosit/validationtool/impl/xml/BaseResolvingStrategy.java
@@ -73,6 +73,7 @@ public abstract class BaseResolvingStrategy implements ResolvingConfigurationStr
         allowExternalSchema(schemaFactory, false, scheme);
     }
 
+    @SuppressWarnings("SameParameterValue")
     protected void allowExternalSchema(final Validator validator, final boolean lenient, final String... schemes) {
         final String schemeString = String.join(",", schemes);
         setProperty(() -> validator.setProperty(XMLConstants.ACCESS_EXTERNAL_SCHEMA, schemeString), lenient, format(
@@ -93,6 +94,7 @@ public abstract class BaseResolvingStrategy implements ResolvingConfigurationStr
         disableExternalEntities(schemaFactory, false);
     }
 
+    @SuppressWarnings("SameParameterValue")
     protected void disableExternalEntities(final Validator validator, final boolean lenient) {
         log.debug("Try to disable extern DTD access");
         setProperty(() -> validator.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, ""), lenient,
@@ -100,6 +102,7 @@ public abstract class BaseResolvingStrategy implements ResolvingConfigurationStr
 
     }
 
+    @SuppressWarnings("SameParameterValue")
     protected void disableExternalEntities(final SchemaFactory schemaFactory, final boolean lenient) {
         log.debug("Try to disable extern DTD access");
         setProperty(() -> schemaFactory.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, ""), lenient,
diff --git a/src/main/java/de/kosit/validationtool/impl/xml/ProcessorProvider.java b/src/main/java/de/kosit/validationtool/impl/xml/ProcessorProvider.java
index 1c99e92..7353cc3 100644
--- a/src/main/java/de/kosit/validationtool/impl/xml/ProcessorProvider.java
+++ b/src/main/java/de/kosit/validationtool/impl/xml/ProcessorProvider.java
@@ -26,11 +26,9 @@ import net.sf.saxon.lib.OutputURIResolver;
 import net.sf.saxon.lib.ResourceCollection;
 import net.sf.saxon.lib.UnparsedTextURIResolver;
 import net.sf.saxon.s9api.Processor;
-import net.sf.saxon.trans.XPathException;
 
 import javax.xml.XMLConstants;
 import javax.xml.transform.Result;
-import javax.xml.transform.TransformerException;
 import java.io.Reader;
 import java.net.URI;
 import java.net.URLEncoder;
@@ -51,22 +49,22 @@ public class ProcessorProvider {
         }
 
         @Override
-        public Result resolve(final String href, final String base) throws TransformerException {
+        public Result resolve(final String href, final String base) {
             throw new IllegalStateException(MESSAGE);
         }
 
         @Override
-        public void close(final Result result) throws TransformerException {
+        public void close(final Result result) {
             throw new IllegalStateException(MESSAGE);
         }
 
         @Override
-        public Reader resolve(final URI absoluteURI, final String encoding, final Configuration config) throws XPathException {
+        public Reader resolve(final URI absoluteURI, final String encoding, final Configuration config) {
             throw new IllegalStateException(MESSAGE);
         }
 
         @Override
-        public ResourceCollection findCollection(final XPathContext context, final String collectionURI) throws XPathException {
+        public ResourceCollection findCollection(final XPathContext context, final String collectionURI) {
             throw new IllegalStateException(MESSAGE);
         }
     }
diff --git a/src/test/java/de/kosit/validationtool/api/InputFactoryTest.java b/src/test/java/de/kosit/validationtool/api/InputFactoryTest.java
index fa2fcc6..126f684 100644
--- a/src/test/java/de/kosit/validationtool/api/InputFactoryTest.java
+++ b/src/test/java/de/kosit/validationtool/api/InputFactoryTest.java
@@ -39,7 +39,6 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-import java.net.URISyntaxException;
 import java.net.URL;
 import java.nio.file.Paths;
 
@@ -102,13 +101,13 @@ public class InputFactoryTest {
     }
 
     @Test
-    public void testInputFile() throws URISyntaxException {
+    public void testInputFile() {
         final Input input = InputFactory.read(new File(Simple.SIMPLE_VALID));
         assertThat(input).isNotNull();
     }
 
     @Test
-    public void testInputPath() throws URISyntaxException {
+    public void testInputPath() {
         final Input input = InputFactory.read(Paths.get(Simple.SIMPLE_VALID));
         assertThat(input).isNotNull();
     }
@@ -124,7 +123,7 @@ public class InputFactoryTest {
     }
 
     @Test
-    public void testEmptyInputName() throws IOException {
+    public void testEmptyInputName() {
         assertThrows(IllegalArgumentException.class, () -> {
             final Input input = InputFactory.read(SOME_VALUE.getBytes(), "");
             drain(input);
diff --git a/src/test/java/de/kosit/validationtool/cmd/CheckAssertionActionTest.java b/src/test/java/de/kosit/validationtool/cmd/CheckAssertionActionTest.java
index b559d0b..86480d1 100644
--- a/src/test/java/de/kosit/validationtool/cmd/CheckAssertionActionTest.java
+++ b/src/test/java/de/kosit/validationtool/cmd/CheckAssertionActionTest.java
@@ -25,7 +25,6 @@ import de.kosit.validationtool.model.reportInput.CreateReportInput;
 import org.junit.Before;
 import org.junit.Test;
 
-import java.io.IOException;
 import java.net.URISyntaxException;
 import java.net.URL;
 
@@ -45,7 +44,7 @@ public class CheckAssertionActionTest {
     private static final URL SAMPLE_ASSERTIONS = CheckAssertionActionTest.class.getResource("/examples/assertions/tests-xrechnung.xml");
 
     @Before
-    public void setup() throws IOException {
+    public void setup() {
         CommandLine.activate();
     }
 
diff --git a/src/test/java/de/kosit/validationtool/cmd/CommandLine.java b/src/test/java/de/kosit/validationtool/cmd/CommandLine.java
index e1b5a5c..b90abd6 100644
--- a/src/test/java/de/kosit/validationtool/cmd/CommandLine.java
+++ b/src/test/java/de/kosit/validationtool/cmd/CommandLine.java
@@ -106,7 +106,7 @@ public class CommandLine {
         return new InputStream() {
 
             @Override
-            public int read() throws IOException {
+            public int read() {
                 return 0;
             }
         };
@@ -124,6 +124,7 @@ public class CommandLine {
         return readLines(out.getOut().toByteArray());
     }
 
+    @SuppressWarnings("unused")
     public static List<String> getErrorLines() {
         return readLines(error.getOut().toByteArray());
     }
diff --git a/src/test/java/de/kosit/validationtool/config/ScenarioBuilderTest.java b/src/test/java/de/kosit/validationtool/config/ScenarioBuilderTest.java
index 98f6fda..2b37000 100644
--- a/src/test/java/de/kosit/validationtool/config/ScenarioBuilderTest.java
+++ b/src/test/java/de/kosit/validationtool/config/ScenarioBuilderTest.java
@@ -24,7 +24,6 @@ import java.util.List;
 import java.util.Map;
 
 import org.apache.commons.text.RandomStringGenerator;
-import org.junit.Rule;
 import org.junit.Test;
 
 import de.kosit.validationtool.impl.ContentRepository;
diff --git a/src/test/java/de/kosit/validationtool/impl/ContentRepositoryTest.java b/src/test/java/de/kosit/validationtool/impl/ContentRepositoryTest.java
index 2407e74..f6cab9c 100644
--- a/src/test/java/de/kosit/validationtool/impl/ContentRepositoryTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/ContentRepositoryTest.java
@@ -57,7 +57,7 @@ public class ContentRepositoryTest {
     }
 
     @Test
-    public void testCreateSchemaNotExisting() throws Exception {
+    public void testCreateSchemaNotExisting() {
         assertThrows(IllegalStateException.class, () -> this.repository.createSchema(Simple.NOT_EXISTING.toURL()));
     }
 
diff --git a/src/test/java/de/kosit/validationtool/impl/ConversionServiceTest.java b/src/test/java/de/kosit/validationtool/impl/ConversionServiceTest.java
index 4662113..a139ea7 100644
--- a/src/test/java/de/kosit/validationtool/impl/ConversionServiceTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/ConversionServiceTest.java
@@ -20,7 +20,6 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertThrows;
 
 import java.io.Serializable;
-import java.net.URISyntaxException;
 import java.net.URL;
 
 import org.junit.Before;
@@ -94,12 +93,12 @@ public class ConversionServiceTest {
     }
 
     @Test
-    public void testUnmarshalUnknownType() throws URISyntaxException {
+    public void testUnmarshalUnknownType() {
         assertThrows(ConversionService.ConversionException.class, () -> this.service.readXml(Simple.SCENARIOS, ConversionService.class));
     }
 
     @Test
-    public void testUnmarshalWithoutType() throws URISyntaxException {
+    public void testUnmarshalWithoutType() {
         assertThrows(ConversionService.ConversionException.class, () -> this.service.readXml(Simple.SCENARIOS, null));
     }
 
diff --git a/src/test/java/de/kosit/validationtool/impl/Helper.java b/src/test/java/de/kosit/validationtool/impl/Helper.java
index 6f4660d..b4ee388 100644
--- a/src/test/java/de/kosit/validationtool/impl/Helper.java
+++ b/src/test/java/de/kosit/validationtool/impl/Helper.java
@@ -87,6 +87,7 @@ public class Helper {
             return new ContentRepository(Helper.getTestProcessor(), strategy, Simple.REPOSITORY_URI);
         }
 
+        @SuppressWarnings("SameReturnValue")
         public static URI getSchemaLocation() {
             return SCHEMA;
         }
diff --git a/src/test/java/de/kosit/validationtool/impl/RelativeUriResolverTest.java b/src/test/java/de/kosit/validationtool/impl/RelativeUriResolverTest.java
index 6986966..c6ddbe4 100644
--- a/src/test/java/de/kosit/validationtool/impl/RelativeUriResolverTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/RelativeUriResolverTest.java
@@ -57,12 +57,12 @@ public class RelativeUriResolverTest {
     }
 
     @Test
-    public void testNotExisting() throws TransformerException {
+    public void testNotExisting() {
         assertThrows(TransformerException.class, () -> this.resolver.resolve("ubl-0001", BASE.toASCIIString()));
     }
 
     @Test
-    public void testOutOfPath() throws TransformerException {
+    public void testOutOfPath() {
         assertThrows(TransformerException.class, () -> this.resolver.resolve("../results/report.xml", BASE.toASCIIString()));
     }
 
diff --git a/src/test/java/de/kosit/validationtool/impl/ScenarioRepositoryTest.java b/src/test/java/de/kosit/validationtool/impl/ScenarioRepositoryTest.java
index 1f99b75..efb51a0 100644
--- a/src/test/java/de/kosit/validationtool/impl/ScenarioRepositoryTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/ScenarioRepositoryTest.java
@@ -121,10 +121,12 @@ public class ScenarioRepositoryTest {
         assertThat(fallback).isNotSameAs(second.getFallbackScenario());
     }
 
+    @SuppressWarnings("SameParameterValue")
     private XdmNode load(final URI uri) throws IOException {
         return Helper.parseDocument(this.configInstance.getContentRepository().getProcessor(), read(uri.toURL())).getObject();
     }
 
+    @SuppressWarnings("SameParameterValue")
     private XPathExecutable createXpath(final String expression) {
         return this.configInstance.getContentRepository().createXPath(expression, new HashMap<>());
     }
diff --git a/src/test/java/de/kosit/validationtool/impl/VersioningTest.java b/src/test/java/de/kosit/validationtool/impl/VersioningTest.java
index 6cbe1a1..4f53b50 100644
--- a/src/test/java/de/kosit/validationtool/impl/VersioningTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/VersioningTest.java
@@ -16,7 +16,6 @@
 
 package de.kosit.validationtool.impl;
 
-import de.kosit.validationtool.impl.Helper.Simple;
 import de.kosit.validationtool.model.scenarios.Scenarios;
 import org.junit.Before;
 import org.junit.Test;
@@ -62,13 +61,13 @@ public class VersioningTest {
     }
 
     @Test
-    public void testNewFeature() throws URISyntaxException {
+    public void testNewFeature() {
         assertThrows(ConversionService.ConversionException.class,
                 () -> this.service.readXml(NEW_FEATURE.toURI(), Scenarios.class, SchemaProvider.getScenarioSchema()));
     }
 
     @Test
-    public void testNewVersion() throws URISyntaxException {
+    public void testNewVersion() {
         assertThrows(ConversionService.ConversionException.class,
                 () -> this.service.readXml(NEW_VERSION.toURI(), Scenarios.class, SchemaProvider.getScenarioSchema()));
     }
diff --git a/src/test/java/de/kosit/validationtool/impl/input/StreamHelperTest.java b/src/test/java/de/kosit/validationtool/impl/input/StreamHelperTest.java
index 9773bf5..59d7076 100644
--- a/src/test/java/de/kosit/validationtool/impl/input/StreamHelperTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/input/StreamHelperTest.java
@@ -43,7 +43,7 @@ public class StreamHelperTest {
         }
 
         @Override
-        public int available() throws IOException {
+        public int available() {
             return 0;
         }
     }
diff --git a/src/test/java/de/kosit/validationtool/impl/tasks/SchemaValidatorActionTest.java b/src/test/java/de/kosit/validationtool/impl/tasks/SchemaValidatorActionTest.java
index af4b84b..ab42d58 100644
--- a/src/test/java/de/kosit/validationtool/impl/tasks/SchemaValidatorActionTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/tasks/SchemaValidatorActionTest.java
@@ -41,7 +41,6 @@ import java.net.MalformedURLException;
 
 import static de.kosit.validationtool.impl.tasks.TestBagBuilder.createBag;
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.*;
 
 /**
diff --git a/src/test/java/de/kosit/validationtool/impl/xml/BaseResolverConfigurationTest.java b/src/test/java/de/kosit/validationtool/impl/xml/BaseResolverConfigurationTest.java
index 2cb9dcf..76e2d86 100644
--- a/src/test/java/de/kosit/validationtool/impl/xml/BaseResolverConfigurationTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/xml/BaseResolverConfigurationTest.java
@@ -25,7 +25,6 @@ import javax.xml.XMLConstants;
 import javax.xml.validation.SchemaFactory;
 
 import static org.junit.Assert.assertThrows;
-import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.*;
 
 /**
diff --git a/src/test/java/de/kosit/validationtool/impl/xml/SchemaProviderTest.java b/src/test/java/de/kosit/validationtool/impl/xml/SchemaProviderTest.java
index fb2b61a..7a042a2 100644
--- a/src/test/java/de/kosit/validationtool/impl/xml/SchemaProviderTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/xml/SchemaProviderTest.java
@@ -23,8 +23,10 @@ import javax.xml.validation.SchemaFactory;
 /**
  * @author Andreas Penski
  */
+@SuppressWarnings("unused")
 public class SchemaProviderTest {
 
+    @SuppressWarnings("unused")
     private final SchemaFactory schemaFactory = ResolvingMode.STRICT_RELATIVE.getStrategy().createSchemaFactory();
 
 }
diff --git a/src/test/java/de/kosit/validationtool/impl/xml/StrictLocalResolvingTest.java b/src/test/java/de/kosit/validationtool/impl/xml/StrictLocalResolvingTest.java
index 21f9d3e..04a22d2 100644
--- a/src/test/java/de/kosit/validationtool/impl/xml/StrictLocalResolvingTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/xml/StrictLocalResolvingTest.java
@@ -35,7 +35,7 @@ import static org.junit.Assert.assertThrows;
 public class StrictLocalResolvingTest {
 
     @Test
-    public void testRemoteSchemaResolving() throws Exception {
+    public void testRemoteSchemaResolving() {
         final ResolvingConfigurationStrategy s = new StrictLocalResolvingStrategy();
         final SchemaFactory schemaFactory = s.createSchemaFactory();
         Throwable e = assertThrows(SAXParseException.class, () -> schemaFactory.newSchema(Resolving.SCHEMA_WITH_REMOTE_REFERENCE.toURL()));
diff --git a/src/test/java/de/kosit/validationtool/impl/xml/StrictRelativeResolvingTest.java b/src/test/java/de/kosit/validationtool/impl/xml/StrictRelativeResolvingTest.java
index d595c0c..1dd131d 100644
--- a/src/test/java/de/kosit/validationtool/impl/xml/StrictRelativeResolvingTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/xml/StrictRelativeResolvingTest.java
@@ -35,7 +35,7 @@ import static org.junit.Assert.assertThrows;
 public class StrictRelativeResolvingTest {
 
     @Test
-    public void testRemoteSchemaResolving() throws Exception {
+    public void testRemoteSchemaResolving() {
         final ResolvingConfigurationStrategy s = new StrictLocalResolvingStrategy();
         final SchemaFactory schemaFactory = s.createSchemaFactory();
         Throwable e = assertThrows(SAXParseException.class, () -> schemaFactory.newSchema(Resolving.SCHEMA_WITH_REMOTE_REFERENCE.toURL()));