diff --git a/private-class-data/src/main/java/com/iluwatar/privateclassdata/App.java b/private-class-data/src/main/java/com/iluwatar/privateclassdata/App.java
index 8cc5254d6..a4e2ffa87 100644
--- a/private-class-data/src/main/java/com/iluwatar/privateclassdata/App.java
+++ b/private-class-data/src/main/java/com/iluwatar/privateclassdata/App.java
@@ -1,34 +1,38 @@
-package com.iluwatar.privateclassdata;
-
-/**
- * 
- * The Private Class Data design pattern seeks to reduce exposure of attributes 
- * by limiting their visibility. It reduces the number of class attributes by 
- * encapsulating them in single data object. It allows the class designer to 
- * remove write privilege of attributes that are intended to be set only during 
- * construction, even from methods of the target class.
- * 
- * In the example we have normal Stew class with some ingredients given in
- * constructor. Then we have methods to enumerate the ingredients and to taste
- * the stew. The method for tasting the stew alters the private members of the
- * stew class.
- * 
- * The problem is solved with the Private Class Data pattern. We introduce
- * ImmutableStew class that contains StewData. The private data members of
- * Stew are now in StewData and cannot be altered by ImmutableStew methods.
- *
- */
-public class App {
-	
-    public static void main( String[] args ) {
-    	// stew is mutable
-    	Stew stew = new Stew(1, 2, 3, 4);
-    	stew.mix();
-    	stew.taste();
-    	stew.mix();
-    	
-    	// immutable stew protected with Private Class Data pattern
-    	ImmutableStew immutableStew = new ImmutableStew(2, 4, 3, 6);
-    	immutableStew.mix();
-    }
-}
+package com.iluwatar.privateclassdata;
+
+/**
+ * 
+ * The Private Class Data design pattern seeks to reduce exposure of attributes 
+ * by limiting their visibility. It reduces the number of class attributes by 
+ * encapsulating them in single data object. It allows the class designer to 
+ * remove write privilege of attributes that are intended to be set only during 
+ * construction, even from methods of the target class.
+ * <p>
+ * In the example we have normal {@link Stew} class with some ingredients given in
+ * constructor. Then we have methods to enumerate the ingredients and to taste
+ * the stew. The method for tasting the stew alters the private members of the
+ * {@link Stew} class.
+ * 
+ * The problem is solved with the Private Class Data pattern. We introduce
+ * {@link ImmutableStew} class that contains {@link StewData}. The private data members of
+ * {@link Stew} are now in {@link StewData} and cannot be altered by {@link ImmutableStew} methods.
+ *
+ */
+public class App {
+	
+	/**
+	 * Program entry point
+	 * @param args command line args
+	 */
+    public static void main( String[] args ) {
+    	// stew is mutable
+    	Stew stew = new Stew(1, 2, 3, 4);
+    	stew.mix();
+    	stew.taste();
+    	stew.mix();
+    	
+    	// immutable stew protected with Private Class Data pattern
+    	ImmutableStew immutableStew = new ImmutableStew(2, 4, 3, 6);
+    	immutableStew.mix();
+    }
+}
diff --git a/private-class-data/src/test/java/com/iluwatar/privateclassdata/AppTest.java b/private-class-data/src/test/java/com/iluwatar/privateclassdata/AppTest.java
index 8ba8c4b80..92fc9b46a 100644
--- a/private-class-data/src/test/java/com/iluwatar/privateclassdata/AppTest.java
+++ b/private-class-data/src/test/java/com/iluwatar/privateclassdata/AppTest.java
@@ -1,14 +1,19 @@
-package com.iluwatar.privateclassdata;
-
-import org.junit.Test;
-
-import com.iluwatar.privateclassdata.App;
-
-public class AppTest {
-
-	@Test
-	public void test() {
-		String[] args = {};
-		App.main(args);
-	}	
-}
+package com.iluwatar.privateclassdata;
+
+import org.junit.Test;
+
+import com.iluwatar.privateclassdata.App;
+
+/**
+ * 
+ * Application test
+ *
+ */
+public class AppTest {
+
+	@Test
+	public void test() {
+		String[] args = {};
+		App.main(args);
+	}	
+}