@Entity
@Table(name="PF_PROFILES")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "objecttype")
public class AbstractProfile extends BasicModel implements Serializable {
   @Id
   @GenericGenerator(name="generator", strategy = "increment")
   @Column(name="id")
   @GeneratedValue(generator = "generator")
   long id;

   @Column(name="profileType")
   String profileType;
   ...
}
@Entity
@DiscriminatorValue("PackageProfile")
public class PackageProfile extends AbstractProfile {
   @ManyToMany(
         cascade = {CascadeType.PERSIST, CascadeType.MERGE},
         fetch = FetchType.EAGER
   )
   @JoinTable(
         name="PF_PROFILES_PACKAGES",
         joinColumns= {@JoinColumn(name="PROFILE_ID")},
         inverseJoinColumns= {@JoinColumn(name="PACKAGE_ID")}
   )
   @Cascade(org.hibernate.annotations.CascadeType.SAVE_UPDATE)
   Set<AbstractPackage> packages = new HashSet();
...
}

@Entity
@Table(name="PF_PACKAGES")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(
      name="objecttype",
      discriminatorType=DiscriminatorType.STRING
)
public class AbstractPackage extends BasicModel implements Serializable {
   @Id
   @GenericGenerator(name="generator", strategy = "increment")
   @GeneratedValue(generator = "generator")
   long id;
...
}


@Entity
@DiscriminatorValue("Package")
public class Package extends AbstractPackage {

   @Type(type = "text")
   String content;
}