Подскажите, где должно быть создано событие
package com.javarush.task.task27.task2712;
import com.javarush.task.task27.task2712.ad.AdvertisementManager;
import com.javarush.task.task27.task2712.kitchen.Cook;
import com.javarush.task.task27.task2712.kitchen.Waiter;
import java.io.IOException;
import java.util.Observer;
public class Restaurant {
public static void main(String[] args) throws IOException {
Tablet tablet = new Tablet(7);
Cook firstCook = new Cook("Armen");
tablet.addObserver(firstCook);
AdvertisementManager advertisementManager = new AdvertisementManager(0);
tablet.addObserver((Observer) advertisementManager);
Waiter waiter = new Waiter();
firstCook.addObserver(waiter);
tablet.createOrder();
}
}