protected void registerEventCommands() {
// register evemt commands
EventCommandManagement.register(-1, new ErrorCommand(), false);
EventCommandManagement.register(0, new NewCommand(), false);
EventCommandManagement.register(101, new MessageCommand(), true);
EventCommandManagement.registerM(new ChoiceCommand(), 102, 404, 402, 403);
EventCommandManagement.register(104, new MessageDisplayCommand(), true);
EventCommandManagement.registerM(new InputCommand(), 103, 105);
EventCommandManagement.register(106, new WaitCommand(), true);
EventCommandManagement.register(108, new CommentCommand(), true);
EventCommandManagement.registerM(new ConditionCommand(), 111, 411, 412);