diff --git a/adapter/src/main/java/com/iluwatar/adapter/App.java b/adapter/src/main/java/com/iluwatar/adapter/App.java
index 43a93fa44..3d10a4d41 100644
--- a/adapter/src/main/java/com/iluwatar/adapter/App.java
+++ b/adapter/src/main/java/com/iluwatar/adapter/App.java
@@ -1,21 +1,25 @@
-package com.iluwatar.adapter;
-
-/**
- * 
- * There are two variations of the Adapter pattern: The class adapter implements
- * the adaptee's interface whereas the object adapter uses composition to
- * contain the adaptee in the adapter object. This example uses the object
- * adapter approach.
- * 
- * The Adapter (GnomeEngineer) converts the interface of the target class
- * (GoblinGlider) into a suitable one expected by the client
- * (GnomeEngineeringManager).
- * 
- */
-public class App {
-
-	public static void main(String[] args) {
-		Engineer manager = new GnomeEngineeringManager();
-		manager.operateDevice();
-	}
-}
+package com.iluwatar.adapter;
+
+/**
+ * 
+ * There are two variations of the Adapter pattern: The class adapter implements
+ * the adaptee's interface whereas the object adapter uses composition to
+ * contain the adaptee in the adapter object. This example uses the object
+ * adapter approach.
+ * <p>
+ * The Adapter ({@link GnomeEngineer}) converts the interface of the target class
+ * ({@link GoblinGlider}) into a suitable one expected by the client
+ * ({@link GnomeEngineeringManager}).
+ * 
+ */
+public class App {
+
+	/**
+	 * Program entry point
+	 * @param args command line args
+	 */
+	public static void main(String[] args) {
+		Engineer manager = new GnomeEngineeringManager();
+		manager.operateDevice();
+	}
+}
diff --git a/adapter/src/main/java/com/iluwatar/adapter/GnomeEngineer.java b/adapter/src/main/java/com/iluwatar/adapter/GnomeEngineer.java
index 62fab599f..35cbc9573 100644
--- a/adapter/src/main/java/com/iluwatar/adapter/GnomeEngineer.java
+++ b/adapter/src/main/java/com/iluwatar/adapter/GnomeEngineer.java
@@ -1,24 +1,24 @@
-package com.iluwatar.adapter;
-
-/**
- * 
- * Adapter class. Adapts the interface of the device (GoblinGlider) into
- * Engineer interface expected by the client (GnomeEngineeringManager).
- * 
- */
-public class GnomeEngineer implements Engineer {
-
-	private GoblinGlider glider;
-
-	public GnomeEngineer() {
-		glider = new GoblinGlider();
-	}
-
-	@Override
-	public void operateDevice() {
-		glider.attachGlider();
-		glider.gainSpeed();
-		glider.takeOff();
-	}
-
-}
+package com.iluwatar.adapter;
+
+/**
+ * 
+ * Adapter class. Adapts the interface of the device ({@link GoblinGlider}) into
+ * {@link Engineer} interface expected by the client ({@link GnomeEngineeringManager}).
+ * 
+ */
+public class GnomeEngineer implements Engineer {
+
+	private GoblinGlider glider;
+
+	public GnomeEngineer() {
+		glider = new GoblinGlider();
+	}
+
+	@Override
+	public void operateDevice() {
+		glider.attachGlider();
+		glider.gainSpeed();
+		glider.takeOff();
+	}
+
+}
diff --git a/adapter/src/main/java/com/iluwatar/adapter/GnomeEngineeringManager.java b/adapter/src/main/java/com/iluwatar/adapter/GnomeEngineeringManager.java
index 6d0010d74..d95065b88 100644
--- a/adapter/src/main/java/com/iluwatar/adapter/GnomeEngineeringManager.java
+++ b/adapter/src/main/java/com/iluwatar/adapter/GnomeEngineeringManager.java
@@ -1,20 +1,20 @@
-package com.iluwatar.adapter;
-
-/**
- * 
- * GnomeEngineering manager uses Engineer to operate devices.
- * 
- */
-public class GnomeEngineeringManager implements Engineer {
-
-	private Engineer engineer;
-
-	public GnomeEngineeringManager() {
-		engineer = new GnomeEngineer();
-	}
-
-	@Override
-	public void operateDevice() {
-		engineer.operateDevice();
-	}
-}
+package com.iluwatar.adapter;
+
+/**
+ * 
+ * GnomeEngineering manager uses {@link Engineer} to operate devices.
+ * 
+ */
+public class GnomeEngineeringManager implements Engineer {
+
+	private Engineer engineer;
+
+	public GnomeEngineeringManager() {
+		engineer = new GnomeEngineer();
+	}
+
+	@Override
+	public void operateDevice() {
+		engineer.operateDevice();
+	}
+}