public class TimerApplication {

    private static TimerApplication instance = new TimerApplication();
    private Timer timer = new Timer();
    
    public static TimerApplication launch() {
        return instance;
    }

    public void start() {
        timer.start();
    }

    public void addListener(ITimerListener listener) {
        timer.listeners.add(listener);
    }
    
    public void removeListener(ITimerListener listener) {
        timer.listeners.remove(listener);
    }
}