public List<UserDto> getAllUser() throws BussinessException  {
		try {
			return convertToDto(env1.getUserDAO().getAllUser());
		} catch (Exception e) {
			if(e instanceof DatabaseException) {
				throw new BussinessException();
			}else if(e instanceof TechnicException) {
				throw new BussinessException();
			}
		}
		return new ArrayList<UserDto>();
	}