docs: update metadata mapping

metadata-mapping/src/main/java/com/iluwatar/metamapping/App.java

@@ -56,9 +56,8 @@ public class App {
    * Program entry point.
    *
    * @param args command line args.
-   * @throws Exception if any error occurs.
    */
-  public static void main(String[] args)  throws Exception {
+  public static void main(String[] args) {
     // get service
     var userService = new UserService();
     // use create service to add users

metadata-mapping/src/main/java/com/iluwatar/metamapping/service/UserService.java

@@ -49,8 +49,8 @@ public class UserService {
     try (var session = factory.openSession()) {
       var tx = session.beginTransaction();
       List<User> userIter = session.createQuery("FROM User").list();
-      for (var iterator = userIter.iterator(); iterator.hasNext();) {
-        users.add(iterator.next());
+      for (User user : userIter) {
+        users.add(user);
       }
       tx.commit();
     } catch (HibernateException e) {

metadata-mapping/src/main/java/com/iluwatar/metamapping/utils/HibernateUtil.java

@@ -24,6 +24,7 @@
  */
 package com.iluwatar.metamapping.utils;
 
+import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
 import org.hibernate.SessionFactory;
 import org.hibernate.cfg.Configuration;
@@ -34,6 +35,7 @@ import org.hibernate.cfg.Configuration;
 @Slf4j
 public class HibernateUtil {
 
+  @Getter
   private static final SessionFactory sessionFactory = buildSessionFactory();
 
   /**
@@ -50,14 +52,6 @@ public class HibernateUtil {
     return new Configuration().configure().buildSessionFactory();
   }
 
-  /**
-   * Get session factory.
-   * @return session factory
-   */
-  public static SessionFactory getSessionFactory() {
-    return sessionFactory;
-  }
-
   /**
    * Close session factory.
    */

metadata-mapping/src/test/java/com/iluwatar/metamapping/AppTest.java

@@ -33,7 +33,6 @@ import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 class AppTest {
   /**
    * Issue: Add at least one assertion to this test case.
-   *
    * Solution: Inserted assertion to check whether the execution of the main method in {@link App#main(String[])}
    * throws an exception.
    */