-import javax.persistence.DiscriminatorColumn;
-import javax.persistence.Entity;
-import javax.persistence.GeneratedValue;
-import javax.persistence.GenerationType;
-import javax.persistence.Id;
-import javax.persistence.Inheritance;
-import javax.persistence.InheritanceType;
-import javax.persistence.Table;
-import javax.persistence.Version;
-
-import org.wamblee.persistence.Persistent;
-