엔티티야 왜 안만들어지니?

@Entity
@Table(name = "groups")
public class Group {

    @Id
    @Column(name = "id")
    private Long id;

    @Column(name = "name")
    private String name;

    @OneToMany(mappedBy = "group")
    private List<GroupPermission> permissions = new ArrayList<>();

    public Long getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public List<GrantedAuthority> getAuthorities() {
        return permissions.stream()
                .map(gp -> new SimpleGrantedAuthority(gp.getPermission().getName()))
                .collect(toList());
    }

    @Override
    public String toString() {
        return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE)
                .append("id", id)
                .append("name", name)
                .append("authorities", getAuthorities())
                .toString();
    }

}