public class RunProjectEvent extends Event implements CancellableEvent {



}

 EventManager manager = new EventManager();

          manager.registerListener(new EventListener());

          manager.registerEvent(new RunProjectEvent(), new EventListener());

 RunProjectEvent event = new RunProjectEvent();

            manager.getDispatcher().callEvent(event);

public class EventListener implements IListener {

    @EventHandler
     public void onStartProgram(RunProjectEvent event) {

        System.out.println("The project has started");

    }
    
}