diff --git a/cqrs/src/main/java/com/iluwatar/cqrs/app/App.java b/cqrs/src/main/java/com/iluwatar/cqrs/app/App.java
index 063d237e0..02c4bed3c 100644
--- a/cqrs/src/main/java/com/iluwatar/cqrs/app/App.java
+++ b/cqrs/src/main/java/com/iluwatar/cqrs/app/App.java
@@ -71,6 +71,13 @@ public class App {
     Book dddBook = queries.getBook("Domain-Driven Design");
     List<Book> jBlochBooks = queries.getAuthorBooks("jBloch");
 
+    System.out.println("Author username : " + nullAuthor);
+    System.out.println("Author eEvans : " + eEvans);
+    System.out.println("jBloch number of books : " + jBlochBooksCount);
+    System.out.println("Number of authors : " + authorsCount);
+    System.out.println("DDD book : " + dddBook);
+    System.out.println("jBloch books : " + jBlochBooks);
+
     HibernateUtil.getSessionFactory().close();
   }
 
diff --git a/cqrs/src/main/java/com/iluwatar/cqrs/commandes/ICommandService.java b/cqrs/src/main/java/com/iluwatar/cqrs/commandes/ICommandService.java
index d752a107e..eb3cc43a1 100644
--- a/cqrs/src/main/java/com/iluwatar/cqrs/commandes/ICommandService.java
+++ b/cqrs/src/main/java/com/iluwatar/cqrs/commandes/ICommandService.java
@@ -6,18 +6,18 @@ package com.iluwatar.cqrs.commandes;
  */
 public interface ICommandService {
 
-  public abstract void authorCreated(String username, String name, String email);
+  void authorCreated(String username, String name, String email);
 
-  public abstract void bookAddedToAuthor(String title, double price, String username);
+  void bookAddedToAuthor(String title, double price, String username);
 
-  public abstract void authorNameUpdated(String username, String name);
+  void authorNameUpdated(String username, String name);
 
-  public abstract void authorUsernameUpdated(String oldUsername, String newUsername);
+  void authorUsernameUpdated(String oldUsername, String newUsername);
 
-  public abstract void authorEmailUpdated(String username, String email);
+  void authorEmailUpdated(String username, String email);
 
-  public abstract void bookTitleUpdated(String oldTitle, String newTitle);
+  void bookTitleUpdated(String oldTitle, String newTitle);
 
-  public abstract void bookPriceUpdated(String title, double price);
+  void bookPriceUpdated(String title, double price);
 
 }
diff --git a/cqrs/src/main/java/com/iluwatar/cqrs/queries/IQueryService.java b/cqrs/src/main/java/com/iluwatar/cqrs/queries/IQueryService.java
index 255796d89..3e3d6ab10 100644
--- a/cqrs/src/main/java/com/iluwatar/cqrs/queries/IQueryService.java
+++ b/cqrs/src/main/java/com/iluwatar/cqrs/queries/IQueryService.java
@@ -13,14 +13,14 @@ import com.iluwatar.cqrs.dto.Book;
  */
 public interface IQueryService {
 
-  public abstract Author getAuthorByUsername(String username);
+  Author getAuthorByUsername(String username);
 
-  public abstract Book getBook(String title);
+  Book getBook(String title);
 
-  public abstract List<Book> getAuthorBooks(String username);
+  List<Book> getAuthorBooks(String username);
 
-  public abstract BigInteger getAuthorBooksCount(String username);
+  BigInteger getAuthorBooksCount(String username);
 
-  public abstract BigInteger getAuthorsCount();
+  BigInteger getAuthorsCount();
 
 }