Sistema de eventos igual o do Bukkit

Event.java

package event;

public abstract class Event {

	public String getName() {
		return getClass().getSimpleName();
	}
	
}

EventManager.java

package event;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.util.ArrayList;
import java.util.List;

public class EventManager {

	public List<Listener> listeners = new ArrayList<Listener>();
	
	public void registerEvent(Listener listener) {
		for(Method method : listener.getClass().getDeclaredMethods()) {
			if(method.isAnnotationPresent(EventHandler.class)) {
				listeners.add(listener);
				break;
			}
		}
	}
	
	public void callEvent(Event event) {
		for(Listener listener : listeners) {
			for(Method method : listener.getClass().getDeclaredMethods()) {
				try {
					if(method.getParameterCount() == 1) {
						if(method.isAnnotationPresent(EventHandler.class)) {
							Parameter param = method.getParameters()[0];
							if(param.getType().equals(event.getClass())) method.invoke(listener, event);
						}
					}
				} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
					e.printStackTrace();
				}
			}
		}
	}
	
}

Listener.java

package event;

public interface Listener {

}

Main.java

import event.EventManager;
import event.MaisEvent;
import event.OutroEvent;
import event.Print;
import event.PrintEvent;

public class Main {

	public static void main(String[] args) {
		PrintEvent evt = new PrintEvent("teste");
		OutroEvent evt2 = new OutroEvent("testado");
		MaisEvent evt3 = new MaisEvent("mais");
		EventManager manager = new EventManager();
		manager.registerEvent(new Print());
		manager.callEvent(evt);
		manager.callEvent(evt2);
		manager.callEvent(evt3);
	}
	
}

MaisEvent.java

package event;

public class MaisEvent extends Event {

	private String toPrint;
	
	public MaisEvent(String toPrint) {
		this.toPrint = toPrint;
	}
	
	public String getToPrint() {
		return toPrint;
	}
	
}

OutroEvent.java

package event;

public class OutroEvent extends Event {
	
	private String toPrint;
	
	public OutroEvent(String toPrint) {
		this.toPrint = toPrint;
	}
	
	public String getToPrint() {
		return toPrint;
	}

}

Print.java

package event;

public class Print implements Listener {
	
	@EventHandler
	public void onPrint(PrintEvent evt) {
		System.out.println("PrintEvent foi chamado! " + evt.getToPrint());
	}
	
	@EventHandler
	public void onOutro(OutroEvent evt) {
		System.out.println("OutroEvent foi chamado! " + evt.getToPrint());
	}
	
	@EventHandler
	public void onMais(MaisEvent evt) {
		System.out.println("MaisEvent foi chamado! " + evt.getToPrint());
	}

}

PrintEvent.java

package event;

public class PrintEvent extends Event {
	
	private String toPrint;
	
	public PrintEvent(String toPrint) {
		this.toPrint = toPrint;
	}
	
	public String getToPrint() {
		return toPrint;
	}

}