ButtonManagement.cs

using UnityEngine;
using System.Collections;

public class ButtonManagement : MonoBehaviour {

	public DelegateTest delegateTest;

	public void ClickAttack () {
		delegateTest.SetCallback (Attack);
	}

	public void ClickDefence () {
		delegateTest.SetCallback (Defence);
	}

	public void ClickDamage () {
		delegateTest.SetCallback (Damage);
	}

	private void Attack () {
		print ("Attack");
	}

	private void Defence () {
		print ("Defence");
	}

	private void Damage () {
		print ("Damege");
	}
}