Hibernate mapping

Event table (LocationID - FK, EventID - PK)
Attendee Table (AttendeeID - PK)
SpeakerID (SpeakerID - PK, EventID - FK)
Event_Attendee (EventID, AttendeeID)

An event can have many attendee and speakers. An attendee can attend many events. One location can also have many events.

<hibernate-mapping>
    <class name="Event" table="events">
        <id name="id" column="uid" type="long">
             <generator class="increment">
        </id>
        <property name="name" type="string" length="100"/>
        <many-to-one name="location" column="locationID" class="Location"/>
        <set name="speakers" cascade="all">
              <key column="eventID"/>
              <one-to-many class=Speakers"/>
        </set>
        <set name="attendee" table="event_attendee" cascade="all">
              <key column="eventID"/>
              <many-to-many column="AttendeeID" class=Attendee"/>
        </set>
    </class>
</hibernate-mapping>