diff --git a/Hitori/pom.xml b/Hitori/pom.xml
index e52b7ab..d70a88f 100644
--- a/Hitori/pom.xml
+++ b/Hitori/pom.xml
@@ -7,6 +7,7 @@
     <groupId>org.example</groupId>
     <artifactId>HitoriTeamProjekt</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
 
     <properties>
         <maven.compiler.source>21</maven.compiler.source>
@@ -44,6 +45,15 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.11.0</version>
+                <configuration>
+                    <source>21</source> <!-- Java-Version -->
+                    <target>21</target> <!-- Java-Version -->
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
@@ -51,7 +61,6 @@
                 <configuration>
                     <archive>
                         <manifest>
-                            <addClasspath>true</addClasspath>
                             <mainClass>PR2.HitoriSpiel.Main.Main</mainClass> <!-- Vollqualifizierter Name deiner Main-Klasse -->
                         </manifest>
                     </archive>
diff --git a/Hitori/src/main/java/PR2/HitoriSpiel/project_structure.puml b/Hitori/src/main/java/PR2/HitoriSpiel/project_structure.puml
new file mode 100644
index 0000000..3a4ffbe
--- /dev/null
+++ b/Hitori/src/main/java/PR2/HitoriSpiel/project_structure.puml
@@ -0,0 +1,113 @@
+@startuml
+package PR2.HitoriSpiel.Domain {
+    class Action {
+        - int row
+        - int col
+        - String oldState
+        - String newState
+        + getRow(): int
+        + getCol(): int
+        + getOldState(): String
+        + getNewState(): String
+    }
+
+    class HitoriBoard {
+        - int[][] numbers
+        - List<String> solutionCoordinates
+        - String boardName
+        + getNumbers(): int[][]
+        + setNumbers(int[][] numbers): void
+        + getCell(int row, int col): HitoriCell
+        + resetBoard(): void
+    }
+
+    class HitoriCell {
+        - int number
+        - CellState state
+        + getNumber(): int
+        + getState(): CellState
+        + setState(CellState state): void
+    }
+
+    class HitoriValidator {
+        - HitoriBoard board
+        + validateBoard(List<String> solution): boolean
+    }
+
+    class StateFileManager {
+        + saveState(Stack<Action> undoStack, Stack<Action> redoStack): void
+        + loadState(Stack<Action> undoStack, Stack<Action> redoStack): void
+    }
+}
+
+package PR2.HitoriSpiel.Fassade {
+    class GameBoard {
+        - HitoriBoard board
+        - Timer timer
+        - long startTime
+        - long pausedTime
+        + startTimer(): void
+        + stopTimer(): void
+        + resumeTimer(): void
+        + resetBoard(): void
+    }
+
+    class StateManager {
+        - Stack<Action> undoStack
+        - Stack<Action> redoStack
+        + saveAction(int row, int col, String oldState, String newState): void
+        + undo(): Action
+        + redo(): Action
+    }
+
+    class Setup {
+        + stylePanel(JPanel panel): void
+        + styleLabel(JLabel label): void
+        + createButton(String text, int width, int height): JButton
+    }
+
+    class HighscoreManager {
+        - List<Highscore> highscoreList
+        + addHighscore(String playerName, int score, String boardName, int errors): void
+        + getHighscoresForBoard(String boardName): List<Highscore>
+    }
+}
+
+package PR2.HitoriSpiel.GUI {
+    class BoardLoader {
+        + loadBoardsAsList(): List<String>
+        + loadBoard(String resourcePath): int[][]
+    }
+
+    class HighscoreDialog {
+        - HighscoreManager highscoreManager
+        - DefaultTableModel tableModel
+        + HighscoreDialog(JFrame parentFrame, List<String> boardNames)
+    }
+
+    class PauseMenu {
+        - GameBoard gameBoard
+        + PauseMenu(JFrame parent, GameBoard gameBoard, ActionListener resumeAction, ActionListener mainMenuAction, ActionListener exitAction)
+    }
+
+    class StartMenu {
+        + selectBoard(): void
+        + randomBoard(): void
+        + highscorelist(): void
+    }
+}
+
+package PR2.HitoriSpiel.Main {
+    class Main {
+        + main(String[] args): void
+    }
+}
+
+PR2.HitoriSpiel.Domain.HitoriBoard "1" *-- "many" PR2.HitoriSpiel.Domain.HitoriCell
+PR2.HitoriSpiel.Domain.StateManager "1" *-- "many" PR2.HitoriSpiel.Domain.Action
+PR2.HitoriSpiel.Fassade.GameBoard "1" *-- "1" PR2.HitoriSpiel.Domain.HitoriBoard
+PR2.HitoriSpiel.GUI.BoardLoader ..> PR2.HitoriSpiel.Domain.HitoriBoard
+PR2.HitoriSpiel.GUI.HighscoreDialog ..> PR2.HitoriSpiel.Fassade.HighscoreManager
+PR2.HitoriSpiel.GUI.PauseMenu --> PR2.HitoriSpiel.Fassade.GameBoard
+PR2.HitoriSpiel.GUI.StartMenu --> PR2.HitoriSpiel.GUI.BoardLoader
+@enduml