DIJavaPlugin.java

public class DIJavaPlugin extends JavaPlugin {

    public void onEnable() {
        getServer().getPluginManager().registerEvents(new Child(this), this);
    }
} class Child implements Listener {
    private final JavaPlugin parentPlugin;

    public Child(JavaPlugin pl) {
        parentPlugin = pl;
    }

    public void onEvent(Event e) {
        Bukkit.getServer().getScheduler().runTaskLater(parentPlugin, () -> {
           // Your code
        }, delayInTicks);
    }
}