Bael 6961 Unnamed Patterns and Variables (#14829)

* BAEL-6961 Added first code snippets

* Added code for article

* Added debug configuration

* Build trigger

---------

Co-authored-by: Vlad <vlad.galuska@hibyte.ro>

core-java-modules/core-java-21/pom.xml

@@ -12,6 +12,12 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
+    <properties>
+        <maven.compiler.source.version>21</maven.compiler.source.version>
+        <maven.compiler.target.version>21</maven.compiler.target.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
     <build>
         <plugins>
             <plugin>
@@ -20,14 +26,22 @@
                 <configuration>
                     <source>21</source>
                     <target>21</target>
-                    <compilerArgs>--enable-preview</compilerArgs>
+                    <!-- Needed due to a bug with JDK 21, described here: https://issues.apache.org/jira/browse/MCOMPILER-546?page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel&focusedCommentId=17767513 -->
+                    <debug>false</debug>
+                    <compilerArgs>
+                        <arg>--enable-preview</arg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <configuration>
+                    <argLine>--enable-preview</argLine>
+                </configuration>
+            </plugin>
+
         </plugins>
     </build>
-    <properties>
-        <maven.compiler.source.version>21</maven.compiler.source.version>
-        <maven.compiler.target.version>21</maven.compiler.target.version>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    </properties>
+
 </project>