diff --git a/examples/maven/hello/src/main/java/org/lastnpe/examples/hello/GenericsExample.java b/examples/maven/hello/src/main/java/org/lastnpe/examples/hello/GenericsExample.java
index a844ee512..35cfc4440 100644
--- a/examples/maven/hello/src/main/java/org/lastnpe/examples/hello/GenericsExample.java
+++ b/examples/maven/hello/src/main/java/org/lastnpe/examples/hello/GenericsExample.java
@@ -1,17 +1,11 @@
 package org.lastnpe.examples.hello;
 
-import org.eclipse.jdt.annotation.NonNull;
-
 @SuppressWarnings("unused")
 public class GenericsExample {
 
     private static class Parent<T> {
     }
 
-    // Null constraint mismatch: The type 'T' is not a valid substitute for the type parameter '@NonNull T'
-    // This seems wrong, because the mouse over hover clearly shows Parent<@NonNull T> (from @NonNullByDefault) and Child<@NonNull T>
-    // Workaround "Child<@NonNull T>" makes it disappear, but why is this needed?
-    // TODO Is this https://bugs.eclipse.org/bugs/show_bug.cgi?id=522142 ?
-    private static class Child<@NonNull T> extends Parent<T> {
+    private static class Child<T> extends Parent<T> {
     }
 }
diff --git a/examples/maven/jdt-ecj-settings/org.eclipse.jdt.core.prefs b/examples/maven/jdt-ecj-settings/org.eclipse.jdt.core.prefs
index dabcefcb3..8173d1ae9 100644
--- a/examples/maven/jdt-ecj-settings/org.eclipse.jdt.core.prefs
+++ b/examples/maven/jdt-ecj-settings/org.eclipse.jdt.core.prefs
@@ -8,8 +8,8 @@ org.eclipse.jdt.core.compiler.annotation.nonnullbydefault.secondary=
 org.eclipse.jdt.core.compiler.annotation.nullable=org.eclipse.jdt.annotation.Nullable
 org.eclipse.jdt.core.compiler.annotation.nullable.secondary=javax.annotation.Nullable
 org.eclipse.jdt.core.compiler.annotation.nullanalysis=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
-org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.compliance=17
 org.eclipse.jdt.core.compiler.problem.annotationSuperInterface=error
 org.eclipse.jdt.core.compiler.problem.autoboxing=ignore
 org.eclipse.jdt.core.compiler.problem.comparingIdentical=error
@@ -57,7 +57,7 @@ org.eclipse.jdt.core.compiler.problem.possibleAccidentalBooleanAssignment=warnin
 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=error
+org.eclipse.jdt.core.compiler.problem.redundantNullAnnotation=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullCheck=warning
 org.eclipse.jdt.core.compiler.problem.redundantSpecificationOfTypeArguments=ignore
 org.eclipse.jdt.core.compiler.problem.redundantSuperinterface=ignore
@@ -95,4 +95,4 @@ org.eclipse.jdt.core.compiler.problem.unusedPrivateMember=warning
 org.eclipse.jdt.core.compiler.problem.unusedTypeParameter=ignore
 org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
-org.eclipse.jdt.core.compiler.source=11
+org.eclipse.jdt.core.compiler.source=17
diff --git a/examples/maven/jdt-ecj-settings/pom.xml b/examples/maven/jdt-ecj-settings/pom.xml
index e76a4e0c1..d7837d8ca 100644
--- a/examples/maven/jdt-ecj-settings/pom.xml
+++ b/examples/maven/jdt-ecj-settings/pom.xml
@@ -32,7 +32,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-resources-plugin</artifactId>
-        <version>3.0.1</version>
+        <version>3.3.1</version>
         <!-- Disable src/test/resources, not needed for creating settings JARs -->
         <executions>
           <execution>
@@ -47,7 +47,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.19.1</version>
+        <version>3.5.0</version>
         <!-- Disable Surefire, not needed for creating settings JARs -->
         <executions>
           <execution>
@@ -59,6 +59,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-deploy-plugin</artifactId>
+        <version>3.1.3</version>
         <configuration>
           <skip>true</skip>
         </configuration>
diff --git a/examples/maven/pom.xml b/examples/maven/pom.xml
index c329b1d19..fc8cf51da 100644
--- a/examples/maven/pom.xml
+++ b/examples/maven/pom.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
@@ -22,19 +25,17 @@
   </modules>
 
   <properties>
-    <eea.java.version>11</eea.java.version>
+    <eea.java.version>17</eea.java.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 
   <dependencies>
-    <!-- The dual use of org.eclipse.jdt.annotation.Nullable
-         as well as javax.annotation.Nullable from FindBugs
-         is to illustrate interop.  You could, of course,
-         choose only one of them for your project. -->
+    <!-- The dual use of org.eclipse.jdt.annotation.Nullable as well as javax.annotation.Nullable from FindBugs
+         is to illustrate interop. You could, of course, choose only one of them for your project. -->
     <dependency>
       <groupId>org.eclipse.jdt</groupId>
       <artifactId>org.eclipse.jdt.annotation</artifactId>
-      <version>2.1.0</version>
+      <version>2.3.0</version>
       <scope>provided</scope>
     </dependency>
     <dependency>
@@ -57,59 +58,31 @@
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
-      <version>1.7.21</version>
+      <version>2.0.16</version>
     </dependency>
     <dependency>
       <groupId>org.lastnpe.eea</groupId>
-      <artifactId>jdk-eea</artifactId>
+      <artifactId>java-${eea.java.version}-eea</artifactId>
       <version>${project.version}</version>
       <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>org.lastnpe.eea</groupId>
-      <artifactId>slf4j-api-eea</artifactId>
+      <artifactId>slf4j-api-2-eea</artifactId>
       <version>${project.version}</version>
       <scope>provided</scope>
     </dependency>
   </dependencies>
 
   <build>
-    <pluginManagement>
-      <plugins>
-        <!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
-        <plugin>
-          <groupId>org.eclipse.m2e</groupId>
-          <artifactId>lifecycle-mapping</artifactId>
-          <version>1.0.0</version>
-          <configuration>
-            <lifecycleMappingMetadata>
-              <pluginExecutions>
-                <pluginExecution>
-                  <pluginExecutionFilter>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-dependency-plugin</artifactId>
-                    <versionRange>[2.10,)</versionRange>
-                    <goals>
-                      <goal>unpack</goal>
-                    </goals>
-                  </pluginExecutionFilter>
-                  <action>
-                    <ignore />
-                  </action>
-                </pluginExecution>
-              </pluginExecutions>
-            </lifecycleMappingMetadata>
-          </configuration>
-        </plugin>
-      </plugins>
-    </pluginManagement>
     <plugins>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-dependency-plugin</artifactId>
-        <version>3.0.2</version>
         <executions>
           <execution>
+            <!-- https://eclipse.dev/m2e/documentation/release-notes-17.html#new-syntax-for-specifying-lifecycle-mapping-metadata -->
+            <?m2e ignore?>
             <id>unpack-jdt-ecj-settings</id>
             <goals>
               <goal>unpack</goal>
@@ -132,45 +105,55 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <!-- TODO disabling toolchains plugin that was enabled in parent pom.
+                  still seems not be compatible with maven-compiler-plugin + tycho-compiler-jdt -->
+        <artifactId>maven-toolchains-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>toolchain@validate</id>
+            <phase>none</phase>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.8.1</version>
         <configuration>
           <release>${eea.java.version}</release>
           <showWarnings>true</showWarnings>
-          <!-- TODO Bug, this does not actually seem to work for alternative compilerId? -->
-          <failOnWarning>true</failOnWarning>
+          <failOnWarning>false</failOnWarning>
           <compilerId>jdt</compilerId>
-          <compilerArguments>
-            <!-- The -annotationpath "CLASSPATH" here causes the JDT ECJ Batch Compiler
-                 to (quote) "When annotation based null analysis is enabled (...),
-                 lookup external annotations from the classpath and sourcepath."
+          <compilerArgs>
+            <!-- The -annotationpath "CLASSPATH" here causes the JDT ECJ Batch Compiler to (quote)
+                 "When annotation based null analysis is enabled (...), lookup external annotations from the classpath and sourcepath."
                  @see http://help.eclipse.org/oxygen/index.jsp?topic=%2Forg.eclipse.jdt.doc.user%2Ftasks%2Ftask-using_batch_compiler.htm
               -->
-            <annotationpath>CLASSPATH</annotationpath>
-            <properties>${project.build.directory}/org.eclipse.jdt.core.prefs</properties>
+            <arg>-annotationpath</arg>
+            <arg>CLASSPATH</arg>
+
+            <arg>-properties</arg>
+            <arg>${project.build.directory}/org.eclipse.jdt.core.prefs</arg>
             <!-- NB: It's NOT possible to list *.prefs properties directly here; see https://issues.apache.org/jira/browse/MCOMPILER-123
               <org.eclipse.jdt.core.compiler.annotation.nullanalysis>enabled</org.eclipse.jdt.core.compiler.annotation.nullanalysis>
               <org.eclipse.jdt.core.compiler.annotation.inheritNullAnnotations>true</org.eclipse.jdt.core.compiler.annotation.inheritNullAnnotations>
             -->
-          </compilerArguments>
-          <!-- Following is an alternative, but it's less ideal, because you would have to manually
+
+            <!-- Following is an alternative, but it's less ideal, because you would have to manually
                map and maintain the org.eclipse.jdt.core.prefs properties to options listed on
                http://help.eclipse.org/neon/index.jsp?topic=/org.eclipse.jdt.doc.user/tasks/task-using_batch_compiler.htm
-           <compilerArgument>-err:nullAnnot,null,-missingNullDefault</compilerArgument>
-          -->
-          <failOnWarning>false</failOnWarning>
+              <arg>-err:nullAnnot,null,-missingNullDefault</arg>
+            -->
+          </compilerArgs>
         </configuration>
         <dependencies>
           <dependency>
             <groupId>org.eclipse.tycho</groupId>
             <artifactId>tycho-compiler-jdt</artifactId>
-            <version>2.0.0</version>
+            <version>3.0.5</version>
           </dependency>
           <dependency>
-            <!-- NB: This dependency is, intentionally, duplicated above
-                 (other one is for CLI mvn; this one is read by eclipse-external-annotations-m2e-plugin
-                 in-IDE to configure the Project Properties via JDT) -->
+            <!-- NB: This dependency is, intentionally, duplicated above (other one is for CLI mvn; this one is
+                 read by eclipse-external-annotations-m2e-plugin in-IDE to configure the Project Properties via JDT) -->
             <groupId>org.lastnpe.examples</groupId>
             <artifactId>jdt-ecj-settings</artifactId>
             <version>${project.version}</version>
diff --git a/pom.xml b/pom.xml
index 9d8a15398..f6d8b3d60 100644
--- a/pom.xml
+++ b/pom.xml
@@ -144,7 +144,7 @@
     <module>generator</module>
     <module>libraries</module>
     <module>eea-all</module>
-    <!--TODO <module>examples/maven</module>-->
+    <module>examples/maven</module>
   </modules>
 
   <profiles>