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

identity-map/src/main/java/com/iluwatar/identitymap/IdNotFoundException.java

@@ -24,6 +24,9 @@
  */
 package com.iluwatar.identitymap;
 
+/**
+ * Using Runtime Exception to control the flow in case Person Id doesn not exist.
+ */
 public class IdNotFoundException extends RuntimeException {
   public IdNotFoundException(final String message) {
     super(message);