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

context-object/src/main/java/com/iluwatar/context/object/LayerA.java

@@ -26,6 +26,9 @@ package com.iluwatar.context.object;
 
 import lombok.Getter;
 
+/**
+ * Layer A in the context object pattern.
+ */
 @Getter
 public class LayerA {
 

context-object/src/main/java/com/iluwatar/context/object/LayerB.java

@@ -26,6 +26,9 @@ package com.iluwatar.context.object;
 
 import lombok.Getter;
 
+/**
+ * Layer B in the context object pattern.
+ */
 @Getter
 public class LayerB {
 

context-object/src/main/java/com/iluwatar/context/object/LayerC.java

@@ -26,6 +26,9 @@ package com.iluwatar.context.object;
 
 import lombok.Getter;
 
+/**
+ * Layer C in the context object pattern.
+ */
 @Getter
 public class LayerC {