@@ -0,0 +1,709 @@
+package engine.gameobject.weapon.upgradetree;%0A%0Aimport java.util.ArrayList;%0Aimport java.util.List;%0Aimport engine.gameobject.weapon.upgradetree.upgradebundle.UpgradeBundle;%0A%0Apublic class NullTree implements UpgradeTree %7B%0A%0A    @Override%0A    public double getValue () %7B%0A        // TODO Auto-generated method stub%0A        return 0;%0A    %7D%0A%0A    @Override%0A    public List%3CUpgradeBundle%3E getNextUpgrades () %7B%0A        return new ArrayList%3CUpgradeBundle%3E();%0A    %7D%0A%0A    @Override%0A    public void updateCurrent (UpgradeTree ... toUpdate) %7B%0A        // TODO Auto-generated method stub%0A%0A    %7D%0A%0A    @Override%0A    public UpgradeTree clone () %7B%0A        // TODO Auto-generated method stub%0A        return new NullTree();%0A    %7D%0A%0A%7D%0A

add NullTree