public Extension(Integer number, Integer barCodeNumber, YearMonthDay acquisition, YearMonthDay cease) { super(); checkParameters(number, acquisition, cease); setNumber(number); setBarCodeNumber(barCodeNumber); setAcquisition(acquisition); setCease(cease);
public Extension(Integer number, Integer barCodeNumber, YearMonthDay acquisition, YearMonthDay cease, Unit owner) {  super(); checkParameters(number, acquisition, cease); setNumber(number); setBarCodeNumber(barCodeNumber); setAcquisition(acquisition); setCease(cease); setOwner(owner);
    public Extension(Integer number, Integer barCodeNumber, YearMonthDay acquisition, YearMonthDay cease) {        super();        checkParameters(number, acquisition, cease);                setNumber(number);        setBarCodeNumber(barCodeNumber);        setAcquisition(acquisition);        setCease(cease);            }