reladomo example (#2469)

* reladomo example

* fix formatting

* add plugin versions

* fix closing streams

libraries/src/main/java/com/baeldung/reladomo/Department.java

@@ -0,0 +1,15 @@
+package com.baeldung.reladomo;
+
+public class Department extends DepartmentAbstract {
+    public Department() {
+        super();
+        // You must not modify this constructor. Mithra calls this internally.
+        // You can call this constructor. You can also add new constructors.
+    }
+
+    public Department(long id, String name) {
+        super();
+        this.setId(id);
+        this.setName(name);
+    }
+}