Error logic in DAO

//DTO
public class UpdateResponse {
    int returnCode;
    String returnMessage;
    Calendar updateTimestamp;
    String updateUser;

    //<getters and setters>
}

//DAO
public UpdateResponse update() throws ServiceException {
    try {
    return translateXmlIntoUpdateResponse(doQuery());
    } catch (RemoteException e) {
        throw new ServiceException(e);
    }
}

//Business
public void stuff() throws MyException {
    // [preceding code ...]
    UpdateResponse updateResponse = dao.update();
    try{
        updateResponse = dao.update();
    } catch (ServiceException e) {
        throw new MyException(e);
    }
    if (updateResponse.getReturnCode() != 0) {
        throw MyException("Code = " + updateResponse.getReturnCode() +
            "; message = " + updateResponse.getMessage());
    }
    // [proceeding code ...]
}