gistfile1.java

// The listener class for Beton...
package io.ivy.fawkes.beton;

import pl.betoncraft.betonquest.core.QuestEvent;

public class TestEvent extends QuestEvent {
    public TestEvent(String playerID, String instructions) {
        super(playerID, instructions);
        System.out.println("TEST EVENT");
    }
}

// The plugin init...

package io.ivy.fawkes;

import io.ivy.fawkes.beton.TestEvent;

import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

import pl.betoncraft.betonquest.BetonQuest;

public class Fawkes extends JavaPlugin {

    private final Events events = new Events(this);

    @Override
    public void onEnable() {
        PluginManager pm = getServer().getPluginManager();
        pm.registerEvents(events, this);

        BetonQuest.getInstance().registerEvents("testevent", TestEvent.class);
    }

    @Override
    public void onDisable() {
    }
}

// Relevant NPC yaml...

//rufus:
//  quester: 'Rufus'
//  unknown: 'Huh?'
//  first: 'start'
//  stop: 'false'
//  final_events: 'testevent'
//  NPC_options:
//    'start':
//      text: 'Hey there, %player%.'
//      conditions: ''
//      events: ''
//      pointer: ''