public class Payment  implements java.io.Serializable {


     private Integer id;
     private Customer customer;
     private Integer agreementId;
     private String customerAlias;

    public Payment() {
    }

    public Payment(Customer customer, Integer agreementId, String customerAlias) {
       this.customer = customer;
       this.agreementId = agreementId;
       this.customerAlias = customerAlias;
    }
   
    public Integer getId() {
        return this.id;
    }
   
    public void setId(Integer id) {
        this.id = id;
    }
    public Customer getCustomer() {
        return this.customer;
    }
   
    public void setCustomer(Customer customer) {
        this.customer = customer;
    }
    public Integer getAgreementId() {
        return this.agreementId;
    }
   
    public void setAgreementId(Integer agreementId) {
        this.agreementId = agreementId;
    }
    public String getCustomerAlias() {
        return this.customerAlias;
    }
   
    public void setCustomerAlias(String customerAlias) {
        this.customerAlias = customerAlias;
    }




}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 16-Apr-2009 10:18:36 by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping>
  <class catalog="test" name="com.port.pojo.Payment" table="payment">
    <id name="id" type="java.lang.Integer">
      <column name="id"/>
      <generator class="identity"/>
    </id>
    <many-to-one class="com.port.pojo.Customer" fetch="select" name="customer">
      <column name="customer_id"/>
    </many-to-one>
    <property name="agreementId" type="java.lang.Integer">
      <column name="Agreement_id"/>
    </property>
    <property name="customerAlias" type="string">
      <column length="50" name="customer_alias"/>
    </property>
  </class>
</hibernate-mapping>

Session session =
     HibernateUtil.getSessionFactory().openSession();
     Transaction tx = session.beginTransaction();
     Payment payment = new Payment(23, 25, 25);
     session.save(payment);
     tx.commit();
session.close();