public UnitManagerImpl(AddUnit addUnit)
 {
     this.addUnit = addUnit;
     dao          = UnitDao.getInstance();
 }
 public UnitManagerImpl(UnitManager unitManager)
 {
     this.unitManager = unitManager;
     dao = UnitDao.getInstance();
 }
 public UnitManagerImpl()
 {
     dao = UnitDao.getInstance();
 }