@MappedSuperclass
public abstract class Model implements Serializable {
     private Long UID;

     @Id @GeneratedValue(strategy=GenerationType.Sequence)
     public Long getUID() {
          return UID;
     }

     /*
          other shared data
     */
}

@Entity
@Table(name="ADDRESS")
@SequenceGenerator(
     name="ADDRESS_SEQ"
     sequenceName="ADDRESS_SEQ"
     allocationSize=1)
public class Address extends Model {
/*
   other mapped data
*/
}

@Entity
@Table(name="PERSON")
@SequenceGenerator(
     name="PERSON_SEQ"
     sequenceName="PERSON_SEQ"
     allocationSize=1)
public class Person extends Model {
/*
   other mapped data
*/
}