package com.relationinfo.dao;import java.util.List;import com.relationinfo.model.Mb;public interface MbDAO extends DAO {    /**     * Retrieves all of the mbs     */    public List getMbs(Mb mb);    /**     * Gets mb's information based on primary key. An     * ObjectRetrievalFailureException Runtime Exception is thrown if      * nothing is found.     *      * @param mbbm the mb's mbbm     * @return mb populated mb object     */    public Mb getMb(final String mbbm);    /**     * Saves a mb's information     * @param mb the object to be saved     */	    public void saveMb(Mb mb);	/**     * Removes a mb from the database by mbbm     * @param mbbm the mb's mbbm     */    public void removeMb(final String mbbm);}