@Audited
class Matter {
    @OneToMany(
            mappedBy = "matter",
            cascade = CascadeType.ALL,
            orphanRemoval = true,
            fetch = FetchType.LAZY
    )
    private List<MatterDefendant> defendants;
}

@Audited
class MatterDefendant {
@Id
    @ManyToOne
    @JoinColumn(name = "matter_id")
    private Matter matter;

    @Id
    @ManyToOne
    @JoinColumn(name = "contact_id")
    private Contact contact;
}