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

strategy/src/main/java/com/iluwatar/strategy/LambdaStrategy.java

@@ -26,9 +26,15 @@ package com.iluwatar.strategy;
 
 import lombok.extern.slf4j.Slf4j;
 
+/**
+ * Lambda implementation for enum strategy pattern.
+ */
 @Slf4j
 public class LambdaStrategy {
 
+  /**
+   * Enum to demonstrate strategy pattern.
+   */
   public enum Strategy implements DragonSlayingStrategy {
     MeleeStrategy(() -> LOGGER.info(
         "With your Excalibur you severe the dragon's head!")),