added diagrams

core/src/com/galaxytrucker/galaxytruckerreloaded/Model/Map/Planet.java

 package com.galaxytrucker.galaxytruckerreloaded.Model.Map;
 
+import com.badlogic.gdx.scenes.scene2d.ui.List;
+import com.galaxytrucker.galaxytruckerreloaded.Model.Ship;
 import com.j256.ormlite.field.DatabaseField;
 import lombok.*;
 
@@ -37,7 +39,7 @@ public class Planet implements Serializable {
      */
     @DatabaseField(columnName = "event", foreign = true)
     @NonNull
-    private PlanetEvent event;
+    private Enum<PlanetEvent> event;
 
     /**
      * If already discovered set to true
@@ -45,4 +47,9 @@ public class Planet implements Serializable {
     @DatabaseField(columnName = "discovered")
     @NonNull
     private boolean discovered = false;
+
+    /** Ships at this planet */
+    @DatabaseField(foreign = true, columnName = "ships")
+    @NonNull
+    private List<Ship> ships;
 }

core/src/com/galaxytrucker/galaxytruckerreloaded/Model/Ship.java

@@ -3,6 +3,7 @@ package com.galaxytrucker.galaxytruckerreloaded.Model;
 import com.badlogic.gdx.scenes.scene2d.ui.List;
 import com.galaxytrucker.galaxytruckerreloaded.Model.Crew.Crew;
 import com.galaxytrucker.galaxytruckerreloaded.Model.Map.Planet;
+import com.galaxytrucker.galaxytruckerreloaded.Model.ShipLayout.Room;
 import com.galaxytrucker.galaxytruckerreloaded.Model.Weapons.Weapon;
 import com.j256.ormlite.field.DatabaseField;
 import com.j256.ormlite.table.DatabaseTable;
@@ -103,12 +104,7 @@ public class Ship implements Serializable {
     /** This ship's systems */
     @NonNull
     @DatabaseField(columnName = "systems",foreign = true)
-    private List<System> systems;
-
-    /** List of crew */
-    @NonNull
-    @DatabaseField(foreign = true,columnName = "crew")
-    private List<Crew> crew;
+    private List<Room> systems;
 
     /** Inventory */
     @NonNull

core/src/com/galaxytrucker/galaxytruckerreloaded/Model/ShipLayout/BlankRoom.java

+package com.galaxytrucker.galaxytruckerreloaded.Model.ShipLayout;
+
+import com.j256.ormlite.field.DatabaseField;
+import com.j256.ormlite.table.DatabaseTable;
+import lombok.*;
+
+@Getter
+@Setter
+@RequiredArgsConstructor(access = AccessLevel.PUBLIC)
+@NoArgsConstructor(access = AccessLevel.PUBLIC)
+@DatabaseTable(tableName = "blankRoom")
+public class BlankRoom extends Room {
+
+    /** ID */
+    @NonNull
+    @DatabaseField(id = true)
+    private int id;
+}

core/src/com/galaxytrucker/galaxytruckerreloaded/Model/ShipLayout/Room.java

@@ -38,4 +38,14 @@ public abstract class Room implements Serializable {
     @DatabaseField(columnName = "oxygen")
     @NonNull
     private int oxygen;
+
+    /** X position */
+    @NonNull
+    @DatabaseField(columnName = "posX")
+    private int posX;
+
+    /** Y position */
+    @NonNull
+    @DatabaseField(columnName = "posY")
+    private int posY;
 }

core/src/com/galaxytrucker/galaxytruckerreloaded/Model/ShipLayout/System.java

 package com.galaxytrucker.galaxytruckerreloaded.Model.ShipLayout;
 
+import com.badlogic.gdx.scenes.scene2d.ui.List;
+import com.galaxytrucker.galaxytruckerreloaded.Model.Crew.Crew;
 import com.j256.ormlite.field.DatabaseField;
 import lombok.*;
 
@@ -36,4 +38,9 @@ public abstract class System extends Room implements Serializable {
     @DatabaseField(columnName = "damage")
     @NonNull
     private int damage;
+
+    /** Crew in this system */
+    @DatabaseField(foreign = true, columnName = "crew")
+    @NonNull
+    private List<Crew> crew;
 }

core/src/com/galaxytrucker/galaxytruckerreloaded/Model/Weapons/Weapon.java

 package com.galaxytrucker.galaxytruckerreloaded.Model.Weapons;
 
+import com.galaxytrucker.galaxytruckerreloaded.Model.Ship;
 import com.j256.ormlite.field.DatabaseField;
 import lombok.*;
 
@@ -15,7 +16,7 @@ public abstract class Weapon implements Serializable {
      */
     @DatabaseField(id = true, columnName = "ID")
     @NonNull
-    private int ID;
+    private int id;
 
     /** Weapon level */
     @NonNull
@@ -92,4 +93,9 @@ public abstract class Weapon implements Serializable {
     @DatabaseField(columnName = "weaponBurst")
     private int burst;
 
+    /** Ship this weapon belongs to */
+    @NonNull
+    @DatabaseField(foreign = true, columnName = "associatedShip")
+    private Ship associatedShip;
+
 }

core/src/com/galaxytrucker/galaxytruckerreloaded/Server/Persistence/CrewDAO.java

@@ -8,11 +8,6 @@ import com.j256.ormlite.support.ConnectionSource;
 
 public class CrewDAO extends ObjectDAO<Crew> {
 
-    /**
-     * Database connection
-     */
-    private ConnectionSource source;
-
     /**
      * Crew dao
      */

core/src/com/galaxytrucker/galaxytruckerreloaded/Server/Persistence/ObjectDAO.java

 package com.galaxytrucker.galaxytruckerreloaded.Server.Persistence;
 
+import com.j256.ormlite.support.ConnectionSource;
+
 /** Template for DAOs */
 public abstract class ObjectDAO<T> {
 
+    /**
+     * Database connection
+     */
+    private ConnectionSource source;
+
     /**
      * Save the object to the database
      *

core/src/com/galaxytrucker/galaxytruckerreloaded/Server/Persistence/OverworldDAO.java

@@ -4,9 +4,13 @@ import com.galaxytrucker.galaxytruckerreloaded.Model.Map.Overworld;
 import com.galaxytrucker.galaxytruckerreloaded.Server.Exception.DuplicateOverworldException;
 import com.galaxytrucker.galaxytruckerreloaded.Server.Exception.OverworldNotFoundException;
 import com.galaxytrucker.galaxytruckerreloaded.Server.Persistence.ObjectDAO;
+import com.j256.ormlite.dao.Dao;
 
 public class OverworldDAO extends ObjectDAO<Overworld> {
 
+    /** OverworldDAO */
+    private Dao<Overworld,String> overworldDAO;
+
     /**
      * Add a new OverWorld to the database
      *

core/src/com/galaxytrucker/galaxytruckerreloaded/Server/Persistence/PlanetDAO.java

@@ -3,9 +3,13 @@ package com.galaxytrucker.galaxytruckerreloaded.Server.Persistence;
 import com.galaxytrucker.galaxytruckerreloaded.Model.Map.Planet;
 import com.galaxytrucker.galaxytruckerreloaded.Server.Exception.DuplicatePlanetException;
 import com.galaxytrucker.galaxytruckerreloaded.Server.Exception.PlanetNotFoundException;
+import com.j256.ormlite.dao.Dao;
 
 public class PlanetDAO extends ObjectDAO<Planet> {
 
+    /** Planet DAO */
+    private Dao<Planet,String> planetDAO;
+
     /**
      * Add a new planet to the database
      *

core/src/com/galaxytrucker/galaxytruckerreloaded/Server/Persistence/ShipDAO.java

@@ -9,11 +9,6 @@ import com.j256.ormlite.support.ConnectionSource;
 
 public class ShipDAO extends ObjectDAO<Ship> {
 
-    /**
-     * Database connection source
-     */
-    private ConnectionSource source;
-
     /**
      * ShipDAO
      */

core/src/com/galaxytrucker/galaxytruckerreloaded/Server/Persistence/UserDAO.java

@@ -8,11 +8,6 @@ import com.j256.ormlite.support.ConnectionSource;
 
 public class UserDAO extends ObjectDAO<User> {
 
-    /**
-     * Database connection source
-     */
-    private ConnectionSource source;
-
     /**
      * UserDAO
      */

core/src/com/galaxytrucker/galaxytruckerreloaded/Server/Server.java

 package com.galaxytrucker.galaxytruckerreloaded.Server;
 
 import com.galaxytrucker.galaxytruckerreloaded.Server.Database.Database;
+import com.galaxytrucker.galaxytruckerreloaded.Server.Services.CrewService;
 
 import java.io.InputStream;
 import java.io.OutputStream;

doc/UML/Datenmodell.drawio

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\ No newline at end of file

doc/UML/Persistence.drawio

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\ No newline at end of file