@Entity
@Table(name="Company")
public class Company {

    @Id @GeneratedValue(strategy = GenerationType.AUTO)
    private int idCompany;
    private String companyName;

    @OneToMany(mappedBy = "company")
    private Set<Department> listOfDepartments = new HashSet<Department>();

    public Set<Department> getListOfDepartments() {
        return listOfDepartments;
    }

    public void setListOfDepartments(Set<Department> listOfDepartments) {
        this.listOfDepartments = listOfDepartments;
    }

    public Company(){}

    public Company(int idCompany, String companyName){
        this.idCompany = idCompany;
        this.companyName = companyName;
    }

    public int getIdCompany() {
        return idCompany;
    }

    public void setIdCompany(int idCompany) {
        this.idCompany = idCompany;
    }

    public String getCompanyName() {
        return companyName;
    }

    public void setCompanyName(String companyName) {
        this.companyName = companyName;
    }

}

package ru.eldarkaa.dto;

import javax.persistence.*;
import javax.xml.bind.annotation.*;
import java.util.*;

@Entity
public class Department {

    @Id @GeneratedValue(strategy = GenerationType.AUTO)
    private int idDepartment;
    private String departmentName;

    @ManyToOne
    @JoinColumn(name="idCompany")
    private Company company;

    @OneToMany(mappedBy = "department")
    private Set<Worker> listOfWorkers = new HashSet<Worker>();

    public Company getCompany() {
        return company;
    }

    public void setCompany(Company company) {
        this.company = company;
    }

    public Set<Worker> getListOfWorkers() {
        return listOfWorkers;
    }

    public void setListOfWorkers(Set<Worker> listOfWorkers) {
        this.listOfWorkers = listOfWorkers;
    }

    public Department(int idDepartment, String departmentName){
        this.idDepartment = idDepartment;
        this.departmentName = departmentName;
    }

    public int getIdDepartment() {
        return idDepartment;
    }

    public void setIdDepartment(int idDepartment) {
        this.idDepartment = idDepartment;
    }

    public String getDepartmentName() {
        return departmentName;
    }

    public void setDepartmentName(String departmentName) {
        this.departmentName = departmentName;
    }

}

@Entity
public class Worker {

    @Id @GeneratedValue(strategy = GenerationType.AUTO)
    private int idWorker;
    private String workerName;

    @ManyToOne
    @JoinColumn(name="idDepartment")
    private Department department;

    public Worker(int idWorker, String workerName){
        this.idWorker = idWorker;
        this.workerName = workerName;
    }

    public int getIdWorker() {
        return idWorker;
    }

    public void setIdWorker(int idWorker) {
        this.idWorker = idWorker;
    }

    public String getWorkerName() {
        return workerName;
    }

    public void setWorkerName(String workerName) {
        this.workerName = workerName;
    }
}

Hibernate: alter table Department drop foreign key FK_l7sg67atqhnn0soqynpvxrtpk
Hibernate: alter table Worker drop foreign key FK_s53hyohtyjy93srd2wkksairk
Hibernate: drop table if exists Company
Hibernate: drop table if exists Department
Hibernate: drop table if exists Worker
Hibernate: create table Company (idCompany integer not null auto_increment, companyName varchar(255), primary key (idCompany))
Hibernate: create table Department (idDepartment integer not null auto_increment, departmentName varchar(255), idCompany integer, primary key (idDepartment))
Hibernate: create table Worker (idWorker integer not null auto_increment, workerName varchar(255), idDepartment integer, primary key (idWorker))
Hibernate: alter table Department add index FK_l7sg67atqhnn0soqynpvxrtpk (idCompany), add constraint FK_l7sg67atqhnn0soqynpvxrtpk foreign key (idCompany) references Company (idCompany)
Hibernate: alter table Worker add index FK_s53hyohtyjy93srd2wkksairk (idDepartment), add constraint FK_s53hyohtyjy93srd2wkksairk foreign key (idDepartment) references Department (idDepartment)
ноя 11, 2013 3:10:31 AM org.hibernate.tool.hbm2ddl.SchemaExport execute
INFO: HHH000230: Schema export complete
Hibernate: insert into Company (companyName) values (?)