@Entity
@Table(name="event_master")
public class EventMaster  implements java.io.Serializable {

     private EventMasterId id;
     private EventTypeMaster eventTypeMaster;
     private String eventName;

    public EventMaster() {
    }
   
    public EventMaster(EventMasterId id, EventTypeMaster eventTypeMaster) {
        this.id = id;
        this.eventTypeMaster = eventTypeMaster;
    }
    public EventMaster(EventMasterId id, EventTypeMaster eventTypeMaster, String eventName) {
       this.id = id;
       this.eventTypeMaster = eventTypeMaster;
       this.eventName = eventName;
    }
   
    @EmbeddedId   
    @AttributeOverrides( {
    @AttributeOverride(name="eventCode", column=@Column(name="Event_Code", nullable=false, length=128) ),
    @AttributeOverride(name="eventTypeCode", column=@Column(name="Event_Type_Code", nullable=false, length=128) ) } )
    public EventMasterId getId() {
        return this.id;
    }
   
    public void setId(EventMasterId id) {
        this.id = id;
    }
   
    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="Event_Type_Code",referencedColumnName = "Event_Type_Code",  nullable=false, insertable=false, updatable=false)
    public EventTypeMaster getEventTypeMaster()
    {
        return this.eventTypeMaster;
    }
   
    public void setEventTypeMaster(EventTypeMaster eventTypeMaster) {
        this.eventTypeMaster = eventTypeMaster;
    }
   
    @Column(name="Event_Name", length=128)
    public String getEventName() {
        return this.eventName;
    }
   
    public void setEventName(String eventName) {
        this.eventName = eventName;
    }
}

@Embeddable
public class EventMasterId  implements java.io.Serializable {


     private String eventCode;
     private String eventTypeCode;

    public EventMasterId() {
    }

    public EventMasterId(String eventCode, String eventTypeCode)
    {
       this.eventCode = eventCode;
       this.eventTypeCode = eventTypeCode;
    }
   

    @Column(name="Event_Code", nullable=false, length=128)
    public String getEventCode() {
        return this.eventCode;
    }
   
    public void setEventCode(String eventCode) {
        this.eventCode = eventCode;
    }

    @Column(name="Event_Type_Code", nullable=false, length=128)
    public String getEventTypeCode() {
        return this.eventTypeCode;
    }
   
    public void setEventTypeCode(String eventTypeCode) {
        this.eventTypeCode = eventTypeCode;
    }


   public boolean equals(Object other) {
         if ( (this == other ) ) return true;
       if ( (other == null ) ) return false;
       if ( !(other instanceof EventMasterId) ) return false;
       EventMasterId castOther = ( EventMasterId ) other;
         
       return ( (this.getEventCode()==castOther.getEventCode()) || ( this.getEventCode()!=null && castOther.getEventCode()!=null && this.getEventCode().equals(castOther.getEventCode()) ) )
&& ( (this.getEventTypeCode()==castOther.getEventTypeCode()) || ( this.getEventTypeCode()!=null && castOther.getEventTypeCode()!=null && this.getEventTypeCode().equals(castOther.getEventTypeCode()) ) );
   }
   
   public int hashCode() {
         int result = 17;
         
         result = 37 * result + ( getEventCode() == null ? 0 : this.getEventCode().hashCode() );
         result = 37 * result + ( getEventTypeCode() == null ? 0 : this.getEventTypeCode().hashCode() );
         return result;
   }   


}

@Entity
@Table(name="event_type_master")
public class EventTypeMaster  implements java.io.Serializable {
     private String eventTypeCode;
     private String eventTypeName;
     private Set<EventMaster> eventMasters = new HashSet<EventMaster>(0);

    public EventTypeMaster() {
    }

   
    public EventTypeMaster(String eventTypeCode) {
        this.eventTypeCode = eventTypeCode;
    }
    public EventTypeMaster(String eventTypeCode, String eventTypeName, Set eventMasters) {
       this.eventTypeCode = eventTypeCode;
       this.eventTypeName = eventTypeName;
       this.eventMasters = eventMasters;
    }
   
    @Id   
    @Column(name="Event_Type_Code", unique=true, nullable=false, length=128)
    public String getEventTypeCode() {
        return this.eventTypeCode;
    }
   
    public void setEventTypeCode(String eventTypeCode) {
        this.eventTypeCode = eventTypeCode;
    }
   
    @Column(name="Event_Type_Name", length=128)
    public String getEventTypeName() {
        return this.eventTypeName;
    }
   
    public void setEventTypeName(String eventTypeName) {
        this.eventTypeName = eventTypeName;
    }
   
    @OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="eventTypeMaster")
    @JoinColumn(name="Event_Type_Code", referencedColumnName = "Event_Type_Code")
    public Set<EventMaster> getEventMasters() {
        return this.eventMasters;
    }
   
    public void setEventMasters(Set<EventMaster> eventMasters) {
        this.eventMasters = eventMasters;
    }




}

Session session = null;
        session = NewHibernateUtil.getSessionFactory().getCurrentSession();
       
        try {
            org.hibernate.Transaction tx = session.beginTransaction();
            EventMasterId key1=new EventMasterId();
            EventTypeMaster eTypeMaster1=new EventTypeMaster();
           
            eTypeMaster1=(EventTypeMaster)session.load(EventTypeMaster.class, "e1");

            key1.setEventCode(eTypeMaster1.getEventTypeCode());
            key1.setEventCode("Test_Event_Code");

            EventMaster em=new EventMaster();
            em.setId(key1);
            em.setEventTypeMaster(eTypeMaster1);
            em.setEventName("Test Event Name");
            em.setEventDesc("Event Description");
       
       
            session.save(em);
       
            session.getTransaction().commit();

        } catch (Exception e) {
            e.printStackTrace();
        }