diff --git a/src/de/oszimt/ls/aliendefence/controller/AlienDefenceController.java b/src/de/oszimt/ls/aliendefence/controller/AlienDefenceController.java
index 866ebf7..534bf1c 100644
--- a/src/de/oszimt/ls/aliendefence/controller/AlienDefenceController.java
+++ b/src/de/oszimt/ls/aliendefence/controller/AlienDefenceController.java
@@ -3,6 +3,7 @@ package de.oszimt.ls.aliendefence.controller;
 import de.oszimt.ls.aliendefence.model.Level;
 import de.oszimt.ls.aliendefence.model.persistence.IPersistance;
 import de.oszimt.ls.aliendefence.model.User;
+import de.oszimt.ls.aliendefence.model.persistence.IUserPersistance;
 
 public class AlienDefenceController {
 	
@@ -11,23 +12,30 @@ public class AlienDefenceController {
 	private LevelController levelController;
 	private TargetController targetController;
 	private AttemptController attemptController;
-	//TODO UserController implementieren
+	private UserController userController;
 	
 	//Persistenz
 	private IPersistance alienDefenceModel;
+	private IUserPersistance userModel;
 
-	public AlienDefenceController(IPersistance alienDefenceModel) {
+	public AlienDefenceController(IPersistance alienDefenceModel, IUserPersistance userModel) {
 		super();
 		this.alienDefenceModel = alienDefenceModel;
+		this.userModel = userModel;
 		this.attemptController = new AttemptController(alienDefenceModel);
 		this.levelController = new LevelController(alienDefenceModel);
 		this.targetController = new TargetController(alienDefenceModel);
+		this.userController = new UserController(userModel);
 	}
 
 	public IPersistance getAlienDefenceModel() {
 		return alienDefenceModel;
 	}
 
+	public IUserPersistance getUserModel() {
+		return userModel;
+	}
+
 	public AttemptController getAttemptController() {
 		return attemptController;
 	}
@@ -40,6 +48,10 @@ public class AlienDefenceController {
 		return targetController;
 	}
 
+	public UserController getUserController() {
+		return userController;
+	}
+
 	public GameController startGame(Level selectedLevel, User user) {
 		this.gameController = new GameController(selectedLevel, user, this);
 		return this.gameController;
diff --git a/src/de/oszimt/ls/aliendefence/controller/UserController.java b/src/de/oszimt/ls/aliendefence/controller/UserController.java
index 10f8c56..b363764 100644
--- a/src/de/oszimt/ls/aliendefence/controller/UserController.java
+++ b/src/de/oszimt/ls/aliendefence/controller/UserController.java
@@ -5,8 +5,7 @@ import de.oszimt.ls.aliendefence.model.persistence.IUserPersistance;
 
 /**
  * de.oszimt.ls.aliendefence.controller for users
- * @author Clara Zufall
- * TODO implement this class
+ * @author Joel Baldauf
  */
 public class UserController {
 
@@ -15,9 +14,14 @@ public class UserController {
 	public UserController(IUserPersistance userPersistance) {
 		this.userPersistance = userPersistance;
 	}
-	
+
+	/**
+	 * erstellt einen User in der Persistenzschicht
+	 * @param user Das zu erstellende Userobjekt
+	 *
+	 */
 	public void createUser(User user) {
-		
+		this.userPersistance.createUser(user);
 	}
 	
 	/**
@@ -26,19 +30,36 @@ public class UserController {
 	 * @param passwort das richtige Passwort
 	 * @return Userobjekt, null wenn der User nicht existiert
 	 */
+
 	public User readUser(String username, String passwort) {
-		return null;
+		if (checkPassword(username, passwort)) return this.userPersistance.readUser(username);
+		else return null;
 	}
-	
+
+	/**
+	 * verändert einen User in der Persistenzschicht
+	 * @param user zu aktualisierender User
+	 *
+	 */
 	public void changeUser(User user) {
-		
+		this.userPersistance.updateUser(user);
 	}
-	
+
+	/**
+	 * löscht einen User in der Persistenzschicht
+	 * @param user zu löschender User
+	 *
+	 */
 	public void deleteUser(User user) {
-		
+		this.userPersistance.deleteUser(user);
 	}
-	
+
+	/**
+	 * überprüft, ob das Passwort eines Benutzers richtig ist
+	 * @param username zu prüfender Nutzername
+	 * @param passwort zu prüfendes Passwort
+	 */
 	public boolean checkPassword(String username, String passwort) {
-		return false;
+		return this.userPersistance.readUser(username).getPassword().equals(passwort);
 	}
 }
diff --git a/src/de/oszimt/ls/aliendefence/model/persistence/IUserPersistance.java b/src/de/oszimt/ls/aliendefence/model/persistence/IUserPersistance.java
index 3fbc6ff..a0d99a4 100644
--- a/src/de/oszimt/ls/aliendefence/model/persistence/IUserPersistance.java
+++ b/src/de/oszimt/ls/aliendefence/model/persistence/IUserPersistance.java
@@ -5,5 +5,7 @@ import de.oszimt.ls.aliendefence.model.User;
 public interface IUserPersistance {
 
 	User readUser(String username);
-
+    int createUser(User user);
+    void updateUser(User user);
+    void deleteUser(User user);
 }
\ No newline at end of file
diff --git a/src/de/oszimt/ls/aliendefence/view/StartAlienDefence.java b/src/de/oszimt/ls/aliendefence/view/StartAlienDefence.java
index 48d4bb7..a603a40 100644
--- a/src/de/oszimt/ls/aliendefence/view/StartAlienDefence.java
+++ b/src/de/oszimt/ls/aliendefence/view/StartAlienDefence.java
@@ -2,7 +2,10 @@ package de.oszimt.ls.aliendefence.view;
 
 import de.oszimt.ls.aliendefence.controller.AlienDefenceController;
 import de.oszimt.ls.aliendefence.model.persistence.IPersistance;
+import de.oszimt.ls.aliendefence.model.persistence.IUserPersistance;
+import de.oszimt.ls.aliendefence.model.persistenceDB.UserDB;
 import de.oszimt.ls.aliendefence.model.persistenceDummy.PersistanceDummy;
+import de.oszimt.ls.aliendefence.model.persistenceDummy.UserDummy;
 import de.oszimt.ls.aliendefence.view.menue.MainMenu;
 
 public class StartAlienDefence {
@@ -10,7 +13,8 @@ public class StartAlienDefence {
 	public static void main(String[] args) {
 		
 		IPersistance 		   alienDefenceModel      = new PersistanceDummy();//TODO new PersistanceDB();
-		AlienDefenceController alienDefenceController = new AlienDefenceController(alienDefenceModel);
+		IUserPersistance       userModel              = new UserDummy();
+		AlienDefenceController alienDefenceController = new AlienDefenceController(alienDefenceModel, userModel);
 		MainMenu.show(alienDefenceController);
 	}
 }