diff --git a/.gitignore b/.gitignore
index 063581c92..a648df837 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,7 +8,8 @@ _LOCAL/
 !**/.settings/org.eclipse.core.resoures.prefs
 !**/.settings/org.eclipse.jdt.core.prefs
 !**/.settings/org.eclipse.pde.core.prefs
-**/.pydevproject
+.pydevproject
+.tycho-consumer-pom.xml
 
 # Eclipse GFM Viewer
 *.md.html
diff --git a/org.eclipse.tm4e.core/.settings/org.eclipse.jdt.core.prefs b/org.eclipse.tm4e.core/.settings/org.eclipse.jdt.core.prefs
index e59c1da88..a49659d2c 100644
--- a/org.eclipse.tm4e.core/.settings/org.eclipse.jdt.core.prefs
+++ b/org.eclipse.tm4e.core/.settings/org.eclipse.jdt.core.prefs
@@ -77,15 +77,15 @@ org.eclipse.jdt.core.compiler.problem.noImplicitStringConversion=warning
 org.eclipse.jdt.core.compiler.problem.nonExternalizedStringLiteral=ignore
 org.eclipse.jdt.core.compiler.problem.nonnullParameterAnnotationDropped=warning
 org.eclipse.jdt.core.compiler.problem.nonnullTypeVariableFromLegacyInvocation=warning
-org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=warning
-org.eclipse.jdt.core.compiler.problem.nullReference=warning
-org.eclipse.jdt.core.compiler.problem.nullSpecViolation=warning
+org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=error
+org.eclipse.jdt.core.compiler.problem.nullReference=error
+org.eclipse.jdt.core.compiler.problem.nullSpecViolation=error
 org.eclipse.jdt.core.compiler.problem.nullUncheckedConversion=info
 org.eclipse.jdt.core.compiler.problem.overridingPackageDefaultMethod=warning
 org.eclipse.jdt.core.compiler.problem.parameterAssignment=ignore
 org.eclipse.jdt.core.compiler.problem.pessimisticNullAnalysisForFreeTypeVariables=warning
 org.eclipse.jdt.core.compiler.problem.possibleAccidentalBooleanAssignment=warning
-org.eclipse.jdt.core.compiler.problem.potentialNullReference=warning
+org.eclipse.jdt.core.compiler.problem.potentialNullReference=error
 org.eclipse.jdt.core.compiler.problem.potentiallyUnclosedCloseable=warning
 org.eclipse.jdt.core.compiler.problem.rawTypeReference=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullAnnotation=warning
diff --git a/org.eclipse.tm4e.core/src/test/java/org/eclipse/tm4e/core/internal/parser/TMParserTest.java b/org.eclipse.tm4e.core/src/test/java/org/eclipse/tm4e/core/internal/parser/TMParserTest.java
index 7daa4b753..136bc4a9c 100644
--- a/org.eclipse.tm4e.core/src/test/java/org/eclipse/tm4e/core/internal/parser/TMParserTest.java
+++ b/org.eclipse.tm4e.core/src/test/java/org/eclipse/tm4e/core/internal/parser/TMParserTest.java
@@ -39,16 +39,15 @@
 @TestMethodOrder(MethodOrderer.MethodName.class)
 class TMParserTest {
 
-	@SuppressWarnings("null")
 	private void validateCaptures(final RawGrammar grammar) {
 		assertNotNull(grammar.getPatterns());
-		assertEquals(1, grammar.getPatterns().size());
-		final var pattern = grammar.getPatterns().iterator().next();
+		assertEquals(1, castNonNull(grammar.getPatterns()).size());
+		final var pattern = castNonNull(grammar.getPatterns()).iterator().next();
 		assertEquals("THE_PATTERN", pattern.getName());
 		assertEquals("BEGIN_PATTERN", pattern.getBegin());
 		assertEquals("END_PATTERN", pattern.getEnd());
-		final var capures = pattern.getCaptures();
-		assertEquals("THE_CAPTURE", capures.getCapture("0").getName());
+		final var capures = castNonNull(pattern.getCaptures());
+		assertEquals("THE_CAPTURE", castNonNull(capures.getCapture("0")).getName());
 	}
 
 	@Test
diff --git a/org.eclipse.tm4e.languageconfiguration/.settings/org.eclipse.jdt.core.prefs b/org.eclipse.tm4e.languageconfiguration/.settings/org.eclipse.jdt.core.prefs
index e59c1da88..a49659d2c 100644
--- a/org.eclipse.tm4e.languageconfiguration/.settings/org.eclipse.jdt.core.prefs
+++ b/org.eclipse.tm4e.languageconfiguration/.settings/org.eclipse.jdt.core.prefs
@@ -77,15 +77,15 @@ org.eclipse.jdt.core.compiler.problem.noImplicitStringConversion=warning
 org.eclipse.jdt.core.compiler.problem.nonExternalizedStringLiteral=ignore
 org.eclipse.jdt.core.compiler.problem.nonnullParameterAnnotationDropped=warning
 org.eclipse.jdt.core.compiler.problem.nonnullTypeVariableFromLegacyInvocation=warning
-org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=warning
-org.eclipse.jdt.core.compiler.problem.nullReference=warning
-org.eclipse.jdt.core.compiler.problem.nullSpecViolation=warning
+org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=error
+org.eclipse.jdt.core.compiler.problem.nullReference=error
+org.eclipse.jdt.core.compiler.problem.nullSpecViolation=error
 org.eclipse.jdt.core.compiler.problem.nullUncheckedConversion=info
 org.eclipse.jdt.core.compiler.problem.overridingPackageDefaultMethod=warning
 org.eclipse.jdt.core.compiler.problem.parameterAssignment=ignore
 org.eclipse.jdt.core.compiler.problem.pessimisticNullAnalysisForFreeTypeVariables=warning
 org.eclipse.jdt.core.compiler.problem.possibleAccidentalBooleanAssignment=warning
-org.eclipse.jdt.core.compiler.problem.potentialNullReference=warning
+org.eclipse.jdt.core.compiler.problem.potentialNullReference=error
 org.eclipse.jdt.core.compiler.problem.potentiallyUnclosedCloseable=warning
 org.eclipse.jdt.core.compiler.problem.rawTypeReference=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullAnnotation=warning
diff --git a/org.eclipse.tm4e.markdown/.settings/org.eclipse.jdt.core.prefs b/org.eclipse.tm4e.markdown/.settings/org.eclipse.jdt.core.prefs
index e59c1da88..a49659d2c 100644
--- a/org.eclipse.tm4e.markdown/.settings/org.eclipse.jdt.core.prefs
+++ b/org.eclipse.tm4e.markdown/.settings/org.eclipse.jdt.core.prefs
@@ -77,15 +77,15 @@ org.eclipse.jdt.core.compiler.problem.noImplicitStringConversion=warning
 org.eclipse.jdt.core.compiler.problem.nonExternalizedStringLiteral=ignore
 org.eclipse.jdt.core.compiler.problem.nonnullParameterAnnotationDropped=warning
 org.eclipse.jdt.core.compiler.problem.nonnullTypeVariableFromLegacyInvocation=warning
-org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=warning
-org.eclipse.jdt.core.compiler.problem.nullReference=warning
-org.eclipse.jdt.core.compiler.problem.nullSpecViolation=warning
+org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=error
+org.eclipse.jdt.core.compiler.problem.nullReference=error
+org.eclipse.jdt.core.compiler.problem.nullSpecViolation=error
 org.eclipse.jdt.core.compiler.problem.nullUncheckedConversion=info
 org.eclipse.jdt.core.compiler.problem.overridingPackageDefaultMethod=warning
 org.eclipse.jdt.core.compiler.problem.parameterAssignment=ignore
 org.eclipse.jdt.core.compiler.problem.pessimisticNullAnalysisForFreeTypeVariables=warning
 org.eclipse.jdt.core.compiler.problem.possibleAccidentalBooleanAssignment=warning
-org.eclipse.jdt.core.compiler.problem.potentialNullReference=warning
+org.eclipse.jdt.core.compiler.problem.potentialNullReference=error
 org.eclipse.jdt.core.compiler.problem.potentiallyUnclosedCloseable=warning
 org.eclipse.jdt.core.compiler.problem.rawTypeReference=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullAnnotation=warning
diff --git a/org.eclipse.tm4e.registry/.settings/org.eclipse.jdt.core.prefs b/org.eclipse.tm4e.registry/.settings/org.eclipse.jdt.core.prefs
index e59c1da88..a49659d2c 100644
--- a/org.eclipse.tm4e.registry/.settings/org.eclipse.jdt.core.prefs
+++ b/org.eclipse.tm4e.registry/.settings/org.eclipse.jdt.core.prefs
@@ -77,15 +77,15 @@ org.eclipse.jdt.core.compiler.problem.noImplicitStringConversion=warning
 org.eclipse.jdt.core.compiler.problem.nonExternalizedStringLiteral=ignore
 org.eclipse.jdt.core.compiler.problem.nonnullParameterAnnotationDropped=warning
 org.eclipse.jdt.core.compiler.problem.nonnullTypeVariableFromLegacyInvocation=warning
-org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=warning
-org.eclipse.jdt.core.compiler.problem.nullReference=warning
-org.eclipse.jdt.core.compiler.problem.nullSpecViolation=warning
+org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=error
+org.eclipse.jdt.core.compiler.problem.nullReference=error
+org.eclipse.jdt.core.compiler.problem.nullSpecViolation=error
 org.eclipse.jdt.core.compiler.problem.nullUncheckedConversion=info
 org.eclipse.jdt.core.compiler.problem.overridingPackageDefaultMethod=warning
 org.eclipse.jdt.core.compiler.problem.parameterAssignment=ignore
 org.eclipse.jdt.core.compiler.problem.pessimisticNullAnalysisForFreeTypeVariables=warning
 org.eclipse.jdt.core.compiler.problem.possibleAccidentalBooleanAssignment=warning
-org.eclipse.jdt.core.compiler.problem.potentialNullReference=warning
+org.eclipse.jdt.core.compiler.problem.potentialNullReference=error
 org.eclipse.jdt.core.compiler.problem.potentiallyUnclosedCloseable=warning
 org.eclipse.jdt.core.compiler.problem.rawTypeReference=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullAnnotation=warning
diff --git a/org.eclipse.tm4e.ui/.settings/org.eclipse.jdt.core.prefs b/org.eclipse.tm4e.ui/.settings/org.eclipse.jdt.core.prefs
index e59c1da88..a49659d2c 100644
--- a/org.eclipse.tm4e.ui/.settings/org.eclipse.jdt.core.prefs
+++ b/org.eclipse.tm4e.ui/.settings/org.eclipse.jdt.core.prefs
@@ -77,15 +77,15 @@ org.eclipse.jdt.core.compiler.problem.noImplicitStringConversion=warning
 org.eclipse.jdt.core.compiler.problem.nonExternalizedStringLiteral=ignore
 org.eclipse.jdt.core.compiler.problem.nonnullParameterAnnotationDropped=warning
 org.eclipse.jdt.core.compiler.problem.nonnullTypeVariableFromLegacyInvocation=warning
-org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=warning
-org.eclipse.jdt.core.compiler.problem.nullReference=warning
-org.eclipse.jdt.core.compiler.problem.nullSpecViolation=warning
+org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=error
+org.eclipse.jdt.core.compiler.problem.nullReference=error
+org.eclipse.jdt.core.compiler.problem.nullSpecViolation=error
 org.eclipse.jdt.core.compiler.problem.nullUncheckedConversion=info
 org.eclipse.jdt.core.compiler.problem.overridingPackageDefaultMethod=warning
 org.eclipse.jdt.core.compiler.problem.parameterAssignment=ignore
 org.eclipse.jdt.core.compiler.problem.pessimisticNullAnalysisForFreeTypeVariables=warning
 org.eclipse.jdt.core.compiler.problem.possibleAccidentalBooleanAssignment=warning
-org.eclipse.jdt.core.compiler.problem.potentialNullReference=warning
+org.eclipse.jdt.core.compiler.problem.potentialNullReference=error
 org.eclipse.jdt.core.compiler.problem.potentiallyUnclosedCloseable=warning
 org.eclipse.jdt.core.compiler.problem.rawTypeReference=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullAnnotation=warning
diff --git a/pom.xml b/pom.xml
index 43a1d63ff..02ae35436 100644
--- a/pom.xml
+++ b/pom.xml
@@ -61,7 +61,7 @@
 		<dependency>
 			<groupId>com.vegardit.no-npe</groupId>
 			<artifactId>no-npe-eea-all</artifactId>
-			<version>1.0.3</version>
+			<version>1.0.4</version>
 			<scope>provided</scope>
 		</dependency>
 	</dependencies>