[BAEL-2424] Added classes and tests

core-java/src/main/java/com/baeldung/reflection/Employee.java

@@ -0,0 +1,7 @@
+package com.baeldung.reflection;
+
+public class Employee extends Person {
+
+    public int employeeId;
+
+}

core-java/src/main/java/com/baeldung/reflection/MonthEmployee.java

@@ -0,0 +1,7 @@
+package com.baeldung.reflection;
+
+public class MonthEmployee extends Employee {
+
+    private double reward;
+
+}

core-java/src/main/java/com/baeldung/reflection/Person.java

@@ -0,0 +1,8 @@
+package com.baeldung.reflection;
+
+public class Person {
+
+    public String lastName;
+    private String firstName;
+
+}