void OnEnable()
 {
     Debug.Log ("------------------");
     Debug.Log ("ABSTRACT FACTORY DESIGN PATTERN");
     // Test here:
     EnemyShipBuilding ufoBuilder = new UFOEnemyShipBuilding();
     ufoBuilder.orderShip(ShipType.UFO);
 }
        void OnEnable()
        {
            Debug.Log("------------------");
            Debug.Log("ABSTRACT FACTORY DESIGN PATTERN");
            // Test here:
            EnemyShipBuilding ufoBuilder = new UFOEnemyShipBuilding();

            ufoBuilder.orderShip(ShipType.UFO);
        }