added all needed subclasses, worked on Ghost classes.

src/main/java/ch/unibas/dmi/dbis/cs108/Klassenstruktur/Ghost.java

@@ -1,4 +1,9 @@
 package ch.unibas.dmi.dbis.cs108.Klassenstruktur;
 
 public class Ghost extends Passenger {
+    protected boolean isOG;             //true if the Ghost is the original ghost.
+
+    public boolean getIsOG() {
+        return isOG;
+    }
 }

src/main/java/ch/unibas/dmi/dbis/cs108/Klassenstruktur/GhostNPC.java

@@ -2,8 +2,16 @@ package ch.unibas.dmi.dbis.cs108.Klassenstruktur;
 
 public class GhostNPC extends Ghost{
 
-    public GhostNPC(int position, String name) {
+    /**
+     * Creates a new GhostNPC. Should be used at game start or if a HumanNPC is turned into a ghost.
+     * @param position position on the train
+     * @param name player name. if null, then a default name is used.
+     * @param isOG true if the ghost is the original ghost.
+     */
+    public GhostNPC(int position, String name, boolean isOG) {
+        this.isOG = isOG;
         this.position = position;
+        this.sock = null;
         isGhost = true;
         isPlayerCharacter = false;
         kickedOff = false;

src/main/java/ch/unibas/dmi/dbis/cs108/Klassenstruktur/GhostPlayer.java

@@ -0,0 +1,25 @@
+package ch.unibas.dmi.dbis.cs108.Klassenstruktur;
+
+import java.net.Socket;
+
+public class GhostPlayer extends Ghost{
+
+    /**
+     * Creates a new GhostPlayer. Should be used at game start or if a HumanPlayer is turned into a ghost.
+     * @param position position on the train
+     * @param name name. if null, then a default name is used.
+     * @param sock the socket for the player.
+     * @param isOG true if the ghost is the original ghost.
+     */
+    public GhostPlayer(int position, String name, Socket sock, boolean isOG) {
+        this.position = position;
+        this.sock = sock;
+        this.isOG = isOG;
+        isGhost = true;
+        isPlayerCharacter = true;
+        kickedOff = false;
+        if (name == null) {
+            this.name = "Human Nr. " + position;
+        } else this.name = name;
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/Klassenstruktur/Human.java

@@ -0,0 +1,4 @@
+package ch.unibas.dmi.dbis.cs108.Klassenstruktur;
+
+public class Human extends Passenger {
+}

src/main/java/ch/unibas/dmi/dbis/cs108/Klassenstruktur/HumanNPC.java

@@ -0,0 +1,5 @@
+package ch.unibas.dmi.dbis.cs108.Klassenstruktur;
+
+public class HumanNPC extends Human {
+
+}

src/main/java/ch/unibas/dmi/dbis/cs108/Klassenstruktur/HumanPlayer.java

@@ -0,0 +1,4 @@
+package ch.unibas.dmi.dbis.cs108.Klassenstruktur;
+
+public class HumanPlayer extends Human{
+}

src/main/java/ch/unibas/dmi/dbis/cs108/Klassenstruktur/Passenger.java

@@ -1,13 +1,14 @@
 package ch.unibas.dmi.dbis.cs108.Klassenstruktur;
 
+import java.net.Socket;
+
 public class Passenger {
     protected int position;               //the player's Cabin number (1 to 6)
     protected String name;                //the player's Name
     protected Boolean isGhost;            //boolean regarding if the player is a ghost. Could probably be removed since ghost is a subclass but I'm keeping it in.
     protected Boolean isPlayerCharacter;  //same here
     protected Boolean kickedOff;          //true if the player has been voted off.
-
+    protected Socket sock;                //the socket for the client associated with this Passenger, for NPCs, this can be null.
-    //todo: there needs to be some variable which keeps track of which client socket / clientThread / NPC thread this passenger is connected to?
 
 
     /**