Move the Token field added from GameEvent to a subclass.

Mage/src/main/java/mage/game/events/CreateTokenEvent.java

@@ -0,0 +1,23 @@
+package mage.game.events;
+
+import mage.game.Game;
+import mage.game.permanent.token.Token;
+
+import java.util.UUID;
+
+public class CreateTokenEvent extends GameEvent {
+    private Token token;
+
+    public CreateTokenEvent(UUID sourceId, UUID controllerId, int amount, Token token) {
+        super(EventType.CREATE_TOKEN, null, sourceId, controllerId, amount, false);
+        this.token = token;
+    }
+
+    public Token getToken() {
+        return token;
+    }
+
+    public void setToken(Token token) {
+        this.token = token;
+    }
+}