[b]Somewhere:[/b]
.....
     @OneToMany(fetch=FetchType.LAZY,cascade = { CascadeType.PERSIST },mappedBy="city")
     @Fetch(FetchMode.SELECT)
     public List<Shop> getShops() {
     return shops;
     }
....

[b]Related model:[/b]
@Entity
@Table(name = "T_SHOP")
      public class Shop {
      private City city;
      ...
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "CITY", nullable = false)
     public City getCity() {
     return city;
}
     ...
}