📍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>

marker/src/main/java/Guard.java

@@ -21,14 +21,13 @@
  * THE SOFTWARE.
  */
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import lombok.extern.slf4j.Slf4j;
 
 /**
  * Class defining Guard.
  */
+@Slf4j
 public class Guard implements Permission {
-  private static final Logger LOGGER = LoggerFactory.getLogger(Guard.class);
 
   protected void enter() {
     LOGGER.info("You can enter");

marker/src/main/java/Thief.java

@@ -21,14 +21,13 @@
  * THE SOFTWARE.
  */
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import lombok.extern.slf4j.Slf4j;
 
 /**
  * Class defining Thief.
  */
+@Slf4j
 public class Thief {
-  private static final Logger LOGGER = LoggerFactory.getLogger(Thief.class);
 
   protected void steal() {
     LOGGER.info("Steal valuable items");

marker/src/test/java/ThiefTest.java

@@ -32,7 +32,7 @@ import org.junit.jupiter.api.Test;
  */
 public class ThiefTest {
   @Test
-  public void testThief() {
+  void testThief() {
     var thief = new Thief();
     assertThat(thief, not(instanceOf(Permission.class)));
   }