dependencies: #2449 bump maven-checkstyle-plugin from 3.1.0 to 3.2.0 + resolve chec… (#2464)

* #2449 bump maven-checkstyle-plugin from 3.1.0 to 3.2.0 + resolve checkstyle issues

* remove FileSelectorJFrame.java to resolve checkstyle issue

* remove FileSelectorJFrame.java to resolve checkstyle issue

* remove FileSelectorJFrame.java to resolve checkstyle issue

* add refactored file with correct filename to resolve checkstyle issue

* add the test data

* change filenames from JFrame to Jframe for checkstyle

* fix code smell from  sonar report

* add new testcases to improve the test coverage

* remove code smell

cqrs/src/main/java/com/iluwatar/cqrs/commandes/CommandService.java

@@ -27,7 +27,7 @@ package com.iluwatar.cqrs.commandes;
 /**
  * This interface represents the commands of the CQRS pattern.
  */
-public interface ICommandService {
+public interface CommandService {
 
   void authorCreated(String username, String name, String email);
 

cqrs/src/main/java/com/iluwatar/cqrs/commandes/CommandServiceImpl.java

@@ -30,10 +30,10 @@ import com.iluwatar.cqrs.util.HibernateUtil;
 import org.hibernate.SessionFactory;
 
 /**
- * This class is an implementation of {@link ICommandService} interface. It uses Hibernate as an api
+ * This class is an implementation of {@link CommandService} interface. It uses Hibernate as an api
  * for persistence.
  */
-public class CommandServiceImpl implements ICommandService {
+public class CommandServiceImpl implements CommandService {
 
   private final SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
 

cqrs/src/main/java/com/iluwatar/cqrs/queries/QueryService.java

@@ -32,7 +32,7 @@ import java.util.List;
 /**
  * This interface represents the query methods of the CQRS pattern.
  */
-public interface IQueryService {
+public interface QueryService {
 
   Author getAuthorByUsername(String username);
 

cqrs/src/main/java/com/iluwatar/cqrs/queries/QueryServiceImpl.java

@@ -34,51 +34,51 @@ import org.hibernate.SessionFactory;
 import org.hibernate.query.Query;
 
 /**
- * This class is an implementation of {@link IQueryService}. It uses Hibernate native queries to
+ * This class is an implementation of {@link QueryService}. It uses Hibernate native queries to
  * return DTOs from the database.
  */
-public class QueryServiceImpl implements IQueryService {
+public class QueryServiceImpl implements QueryService {
 
   private final SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
 
   @Override
   public Author getAuthorByUsername(String username) {
-    Author authorDTo;
+    Author authorDto;
     try (var session = sessionFactory.openSession()) {
       Query<Author> sqlQuery = session.createQuery(
               "select new com.iluwatar.cqrs.dto.Author(a.name, a.email, a.username)"
                       + " from com.iluwatar.cqrs.domain.model.Author a where a.username=:username");
       sqlQuery.setParameter(AppConstants.USER_NAME, username);
-      authorDTo = sqlQuery.uniqueResult();
+      authorDto = sqlQuery.uniqueResult();
     }
-    return authorDTo;
+    return authorDto;
   }
 
   @Override
   public Book getBook(String title) {
-    Book bookDTo;
+    Book bookDto;
     try (var session = sessionFactory.openSession()) {
       Query<Book> sqlQuery = session.createQuery(
               "select new com.iluwatar.cqrs.dto.Book(b.title, b.price)"
                       + " from com.iluwatar.cqrs.domain.model.Book b where b.title=:title");
       sqlQuery.setParameter("title", title);
-      bookDTo = sqlQuery.uniqueResult();
+      bookDto = sqlQuery.uniqueResult();
     }
-    return bookDTo;
+    return bookDto;
   }
 
   @Override
   public List<Book> getAuthorBooks(String username) {
-    List<Book> bookDTos;
+    List<Book> bookDtos;
     try (var session = sessionFactory.openSession()) {
       Query<Book> sqlQuery = session.createQuery(
               "select new com.iluwatar.cqrs.dto.Book(b.title, b.price)"
                       + " from com.iluwatar.cqrs.domain.model.Author a, com.iluwatar.cqrs.domain.model.Book b "
                       + "where b.author.id = a.id and a.username=:username");
       sqlQuery.setParameter(AppConstants.USER_NAME, username);
-      bookDTos = sqlQuery.list();
+      bookDtos = sqlQuery.list();
     }
-    return bookDTos;
+    return bookDtos;
   }
 
   @Override

cqrs/src/test/java/com/iluwatar/cqrs/IntegrationTest.java

@@ -30,7 +30,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 import com.iluwatar.cqrs.commandes.CommandServiceImpl;
 import com.iluwatar.cqrs.dto.Author;
 import com.iluwatar.cqrs.dto.Book;
-import com.iluwatar.cqrs.queries.IQueryService;
+import com.iluwatar.cqrs.queries.QueryService;
 import com.iluwatar.cqrs.queries.QueryServiceImpl;
 import java.math.BigInteger;
 import org.junit.jupiter.api.BeforeAll;
@@ -41,7 +41,7 @@ import org.junit.jupiter.api.Test;
  */
 class IntegrationTest {
 
-  private static IQueryService queryService;
+  private static QueryService queryService;
 
   @BeforeAll
   static void initializeAndPopulateDatabase() {