📍Use lombok, reformat, and optimize the code (#1560)

* Use lombok, reformat, and optimize the code

* Fix merge conflicts and some sonar issues

Co-authored-by: va1m <va1m@email.com>

delegation/src/test/java/com/iluwatar/delegation/simple/DelegateTest.java

@@ -41,24 +41,24 @@ import org.slf4j.LoggerFactory;
 /**
  * Test for Delegation Pattern
  */
-public class DelegateTest {
+class DelegateTest {
 
   private InMemoryAppender appender;
 
   @BeforeEach
-  public void setUp() {
+  void setUp() {
     appender = new InMemoryAppender();
   }
 
   @AfterEach
-  public void tearDown() {
+  void tearDown() {
     appender.stop();
   }
 
   private static final String MESSAGE = "Test Message Printed";
 
   @Test
-  public void testCanonPrinter() throws Exception {
+  void testCanonPrinter() throws Exception {
     var printerController = new PrinterController(new CanonPrinter());
     printerController.print(MESSAGE);
 
@@ -66,7 +66,7 @@ public class DelegateTest {
   }
 
   @Test
-  public void testHpPrinter() throws Exception {
+  void testHpPrinter() throws Exception {
     var printerController = new PrinterController(new HpPrinter());
     printerController.print(MESSAGE);
 
@@ -74,7 +74,7 @@ public class DelegateTest {
   }
 
   @Test
-  public void testEpsonPrinter() throws Exception {
+  void testEpsonPrinter() throws Exception {
     var printerController = new PrinterController(new EpsonPrinter());
     printerController.print(MESSAGE);
 
@@ -84,7 +84,7 @@ public class DelegateTest {
   /**
    * Logging Appender
    */
-  private class InMemoryAppender extends AppenderBase<ILoggingEvent> {
+  private static class InMemoryAppender extends AppenderBase<ILoggingEvent> {
 
     private final List<ILoggingEvent> log = new LinkedList<>();