Cascade save-update Project in Hibernate

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>HibernateCascade</groupId>
  <artifactId>HibernateCascade</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>HibernateCascade</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
     <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>5.2.6.Final</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>6.0.5</version>
		</dependency>
  </dependencies>
</project>

package com.kb.model;

import java.util.Set;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.hibernate.annotations.Cascade;
import org.hibernate.annotations.CascadeType;

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

	@Id
	@GeneratedValue(strategy = GenerationType.SEQUENCE)
	@Column(name = "Applicant_Id")
	private int applicantId;
	
	@Column(name = "FirstName")
	private String firstName;
	
	@Column(name = "LastName")
	private String lastName;
	
	@Column(name = "Age")
	private int age;
	
	@Column(name = "Education")
	private String education;
	
	@OneToMany(mappedBy="applicant")
	@Cascade(CascadeType.SAVE_UPDATE)
	private Set<Address> addresses;h
	
	public int getApplicantId() {
		return applicantId;
	}
	public void setApplicantId(int applicantId) {
		this.applicantId = applicantId;
	}
	public String getFirstName() {
		return firstName;
	}
	public void setFirstName(String firstName) {
		this.firstName = firstName;
	}
	public String getLastName() {
		return lastName;
	}
	public void setLastName(String lastName) {
		this.lastName = lastName;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getEducation() {
		return education;
	}
	public void setEducation(String education) {
		this.education = education;
	}
	public Set<Address> getAddresses() {
		return addresses;
	}
	public void setAddresses(Set<Address> addresses) {
		this.addresses = addresses;
	}

}

package com.kb.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

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

	@Id
	@GeneratedValue(strategy = GenerationType.SEQUENCE)
	@Column(name = "Address_Id")
	private int addressId;
	
	@Column(name = "Street")
	private String street;
	
	@Column(name = "City")
	private String city;
	
	@Column(name = "Zipcode")
	private String zipcode;
	
	@ManyToOne
	@JoinColumn(name="Applicant_Id")
	private Applicant applicant;
	
	public int getAddressId() {
		return addressId;
	}
	public void setAddressId(int addressId) {
		this.addressId = addressId;
	}
	public String getStreet() {
		return street;
	}
	public void setStreet(String street) {
		this.street = street;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	public String getZipcode() {
		return zipcode;
	}
	public void setZipcode(String zipcode) {
		this.zipcode = zipcode;
	}
	public Applicant getApplicant() {
		return applicant;
	}
	public void setApplicant(Applicant applicant) {
		this.applicant = applicant;
	}

}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
       "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
       "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
 
<hibernate-configuration>
 
   <session-factory>
 
       <!-- Database connection properties -->
       <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
       <property name="connection.url">jdbc:mysql://localhost/javainsimpleway</property>
       <property name="connection.username">root</property>
       <property name="connection.password">root</property>
 
       <!-- JDBC connection pool (using the built-in) -->
       <property name="connection.pool_size">100</property>
 
       <!-- SQL dialect -->
       <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
 
       <!-- Disable the second-level cache -->
       <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
 
       <!-- Echo all executed SQL to stdout -->
       <property name="show_sql">true</property>
       
       <!-- Format the generated Sql -->
       <property name="format_sql">true</property>
 
       <!-- Dont Drop and re-create the database schema on startup,Just update it -->
       <property name="hbm2ddl.auto">update</property>
 
          <mapping class="com.kb.model.Applicant" />
	  <mapping class="com.kb.model.Address" />
 
   </session-factory>
 
</hibernate-configuration>

package com.kb.util;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
	private static final SessionFactory sessionFactory = buildSessionFactory();

    private static SessionFactory buildSessionFactory() {
        try {
            // Create the SessionFactory from hibernate.cfg.xml
            return new Configuration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            // Make sure you log the exception to track it
            System.err.println("SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
    
    public static void shutdown() {
    	// Optional but can be used to Close caches and connection pools
    	getSessionFactory().close();
    }

}

package com.kb.db;

import java.util.HashSet;
import java.util.Set;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

import com.kb.model.Address;
import com.kb.model.Applicant;
import com.kb.util.HibernateUtil;

public class Main {
	public static void main(String[] args) {
		// Get session factory using Hibernate Util class
		SessionFactory sf = HibernateUtil.getSessionFactory();
		// Get session from Sesson factory
		Session session = sf.openSession();

		// Begin transaction
		Transaction t = session.beginTransaction();
		//Create Applicant Model data
		Applicant applicant = new Applicant();
		applicant.setFirstName("John");
		applicant.setLastName("KC");
		applicant.setAge(28);
		applicant.setEducation("Graduation");

		//Create Address Model data
		Address currentAdd = new Address();
		currentAdd.setStreet("Royal road");
		currentAdd.setCity("Newyork");
		currentAdd.setZipcode("10001");
		currentAdd.setApplicant(applicant);
		
		Address permanentAdd = new Address();
		permanentAdd.setStreet("Manyar Road");
		permanentAdd.setCity("Sydney");
		permanentAdd.setZipcode("2060");
		permanentAdd.setApplicant(applicant);
		
		Set<Address> addresses = new HashSet<Address>();
		addresses.add(currentAdd);
		addresses.add(permanentAdd);

		applicant.setAddresses(addresses);

		session.save(applicant);
		
		// Commit the transaction and close the session
		t.commit();
		session.close();
		System.out.println("successfully persisted Applicant details");
	}

}