diff --git a/src/main/java/com/aparapi/examples/mandel/AfGUI.java b/src/main/java/com/aparapi/examples/mandel/AfGUI.java
index f0f2eefa952306864054194b8e242264e9549be4..a80a345c6d01d10123a48250b25bd72a58a73de2 100644
--- a/src/main/java/com/aparapi/examples/mandel/AfGUI.java
+++ b/src/main/java/com/aparapi/examples/mandel/AfGUI.java
@@ -14,6 +14,11 @@ import java.awt.image.BufferedImage;
 import javax.swing.JFrame;
 import javax.swing.JPanel;
 
+/**
+ * a JFrame, a JPanel and mouse handling
+ * 
+ * autor marco.stefanetti at gmail.com
+ */
 public class AfGUI {
 
 	private AfMain main;
diff --git a/src/main/java/com/aparapi/examples/mandel/AfKernel.java b/src/main/java/com/aparapi/examples/mandel/AfKernel.java
index 0d6623a7c53b4b088107ec3fe9b12592e9e8b89c..4aa1b5dede49775deefadf596ed478e6b77dfa61 100644
--- a/src/main/java/com/aparapi/examples/mandel/AfKernel.java
+++ b/src/main/java/com/aparapi/examples/mandel/AfKernel.java
@@ -2,6 +2,11 @@ package com.aparapi.examples.mandel;
 
 import com.aparapi.Kernel;
 
+/**
+ * the kernel executes the math with complex numbers
+ * 
+ * autor marco.stefanetti at gmail.com
+ */
 public class AfKernel extends Kernel{
 	
 	private int[] rv;
diff --git a/src/main/java/com/aparapi/examples/mandel/AfMain.java b/src/main/java/com/aparapi/examples/mandel/AfMain.java
index ee4ab7f3023e81b7edc6e3ed43fe980442dd43de..5271eebd9a35b23efe6771ce77c18da056872a8f 100644
--- a/src/main/java/com/aparapi/examples/mandel/AfMain.java
+++ b/src/main/java/com/aparapi/examples/mandel/AfMain.java
@@ -2,6 +2,11 @@ package com.aparapi.examples.mandel;
 
 import com.aparapi.Range;
 
+/**
+ * the main class coordinates the GUI and the kernel
+ * 
+ * autor marco.stefanetti at gmail.com
+ */
 public class AfMain {
 
 	protected int W = 768;