package com.xc.hotelmanager.hotel.control.session;import javax.ejb.*;import java.util.*;import java.rmi.*;import com.xc.hotelmanager.hotel.model.*;import com.xc.hotelmanager.hotel.exception.*;public interface SB_CustomerManager extends javax.ejb.EJBObject {  public Customer loadCustomer(String cid) throws HotelManagerException,RemoteException;  public Customer exitCustomer(String cid) throws HotelManagerException,RemoteException;  public void removeCustomer(String cid) throws HotelManagerException,RemoteException;  public Customer saveCustomer(Customer cus) throws HotelManagerException,RemoteException;  public Customer addCustomer(Customer cus) throws HotelManagerException,RemoteException;  public Collection getAllCustomer() throws HotelManagerException,RemoteException;}