diff --git a/schach/pom.xml b/schach/pom.xml
index a120fc0..546c1ea 100644
--- a/schach/pom.xml
+++ b/schach/pom.xml
@@ -10,13 +10,12 @@
   <version>0.0.1-SNAPSHOT</version>
 
   <name>schach</name>
-  <description>A simple schach.</description>
+  <description>A simple schach project</description>
   <url>http://www.example.com</url>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <maven.compiler.source>21</maven.compiler.source>
-    <maven.compiler.target>21</maven.compiler.target>
+    <maven.compiler.release>21</maven.compiler.release>
   </properties>
 
   <repositories>
@@ -27,22 +26,31 @@
   </repositories>
 
   <dependencies>
-    <!-- Schachlib (bhlangonijr) -->
+    <!-- Schachlib -->
     <dependency>
       <groupId>com.github.bhlangonijr</groupId>
       <artifactId>chesslib</artifactId>
       <version>1.3.4</version>
     </dependency>
-    <!-- JUnit 3 (wie im Template, ggf. auf JUnit 4/5 upgraden für moderne Projekte) -->
+
     <dependency>
 	    <groupId>org.junit.jupiter</groupId>
 	    <artifactId>junit-jupiter</artifactId>
 	    <version>5.10.2</version>
 	    <scope>test</scope>
 	</dependency>
-  </dependencies>
+
+    <!-- Mockito -->
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <version>5.11.0</version>
+      <scope>test</scope>
+    </dependency>
+ </dependencies>
 
   <build>
+
     <pluginManagement>
       <plugins>
         <plugin>
@@ -83,12 +91,58 @@
         </plugin>
       </plugins>
     </pluginManagement>
+    <plugins>
+      <!-- Java Compiler Plugin -->
+      <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.13.0</version>
+        <configuration>
+          <release>21</release>
+        </configuration>
+      </plugin>
+
+      <!-- PMD Plugin -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-pmd-plugin</artifactId>
+        <version>3.21.0</version>
+        <configuration>
+          <!-- Set to 17 until PMD supports 21 -->
+          <targetJdk>17</targetJdk>
+          <failOnViolation>false</failOnViolation>
+          <printFailingErrors>true</printFailingErrors>
+          <linkXRef>false</linkXRef>
+          <rulesets>
+            <ruleset>rulesets/java/quickstart.xml</ruleset>
+            <ruleset>rulesets/java/basic.xml</ruleset>
+            <ruleset>rulesets/java/braces.xml</ruleset>
+            <ruleset>rulesets/java/unusedcode.xml</ruleset>
+            <ruleset>rulesets/java/imports.xml</ruleset>
+          </rulesets>
+        </configuration>
+        <executions>
+          <execution>
+            <phase>verify</phase>
+            <goals>
+              <goal>check</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+
+      <!-- Surefire Plugin for tests -->
+      <plugin>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <version>3.3.0</version>
+      </plugin>
+	</plugins>
   </build>
 
   <reporting>
     <plugins>
       <plugin>
         <artifactId>maven-project-info-reports-plugin</artifactId>
+        <version>3.6.1</version>
       </plugin>
     </plugins>
   </reporting>
diff --git a/schach/src/main/java/de/hs_mannheim/informatik/chess/controller/GameController.java b/schach/src/main/java/de/hs_mannheim/informatik/chess/controller/GameController.java
index a30cccd..aa6d73f 100644
--- a/schach/src/main/java/de/hs_mannheim/informatik/chess/controller/GameController.java
+++ b/schach/src/main/java/de/hs_mannheim/informatik/chess/controller/GameController.java
@@ -25,7 +25,8 @@ public class GameController {
     GameEndCallback callback;
     
     private boolean gameOver = false;
-    private int selectedRow = -1, selectedCol = -1;
+    private int selectedRow = -1;
+    private int selectedCol = -1;
     private List<int[]> highlightedFields = new ArrayList<>();
     private boolean gameWasResignedOrDrawn = false;
     private GameMode gameMode;