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/PersonDbSimulator.java

@@ -24,13 +24,16 @@
  */
 package com.iluwatar.identitymap;
 
+/**
+ * Simulator interface for Person DB.
+ */
 public interface PersonDbSimulator {
-  Person find(int personNationalID);
+  Person find(int personNationalId);
 
   void insert(Person person);
 
   void update(Person person);
 
-  void delete(int personNationalID);
+  void delete(int personNationalId);
 
 }