diff --git a/pom.xml b/pom.xml
index cd46c16..f6bc1d7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
 
     <groupId>io.github.mojtabaj</groupId>
     <artifactId>c-webp</artifactId>
-    <version>1.0.1</version>
+    <version>1.0.2</version>
     <packaging>jar</packaging>
 
     <name>WebP Converter</name>
diff --git a/src/main/java/io/github/mojtabaJ/cwebp/CWebp.java b/src/main/java/io/github/mojtabaJ/cwebp/CWebp.java
index 6bb3365..194aeb5 100644
--- a/src/main/java/io/github/mojtabaJ/cwebp/CWebp.java
+++ b/src/main/java/io/github/mojtabaJ/cwebp/CWebp.java
@@ -2,7 +2,14 @@
 
 import java.io.*;
 
+
 /**
+ * created by: Mojtaba Jalambadani
+ * project name: c-webp
+ * 24/07/2022
+ * All Rights Reserved.
+ *
+ *
  * util fot create and execute cwebp command to compresses an image using the WebP format.
  * Input format can be either PNG, JPEG, TIFF, WebP or raw Y'CbCr samples.
  * Note: Animated PNG and WebP files are not supported.
diff --git a/src/main/java/io/github/mojtabaJ/cwebp/CWebpException.java b/src/main/java/io/github/mojtabaJ/cwebp/CWebpException.java
new file mode 100644
index 0000000..f7e6955
--- /dev/null
+++ b/src/main/java/io/github/mojtabaJ/cwebp/CWebpException.java
@@ -0,0 +1,19 @@
+package io.github.mojtabaJ.cwebp;
+
+/**
+ * created by: Mojtaba Jalambadani
+ * project name: c-webp
+ * 24/07/2022
+ * All Rights Reserved.
+ **/
+public class CWebpException extends Exception{
+
+
+    public CWebpException(String message) {
+        super(message);
+    }
+
+    public CWebpException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/src/main/java/io/github/mojtabaJ/cwebp/WebpConverter.java b/src/main/java/io/github/mojtabaJ/cwebp/WebpConverter.java
index 5df584e..bbed044 100644
--- a/src/main/java/io/github/mojtabaJ/cwebp/WebpConverter.java
+++ b/src/main/java/io/github/mojtabaJ/cwebp/WebpConverter.java
@@ -11,14 +11,30 @@
  * project name: c-webp
  * 21/07/2022
  * All Rights Reserved.
- **/
+ *
+ *
+ * util fot create and execute cwebp command to compresses an image using the WebP format.
+ * Input format can be either PNG, JPEG, TIFF, WebP or raw Y'CbCr samples.
+ * Note: Animated PNG and WebP files are not supported.
+ */
 public class WebpConverter {
 
+
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP Byte
+     * @param imageByte input image byte
+     * @return WebP image Byte
+     */
     public static byte[] imageByteToWebpByte(byte[] imageByte){
         return imageByteToWebpByte(imageByte, 75);
     }
 
-
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP Byte
+     * @param imageByte input image byte
+     * @param quality compression factor for RGB channels
+     * @return WebP image Byte
+     */
     public static byte[] imageByteToWebpByte(byte[] imageByte, int quality){
         try {
 
@@ -42,7 +58,12 @@ public static byte[] imageByteToWebpByte(byte[] imageByte, int quality){
         return null;
     }
 
-
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP Byte
+     * @param imageFilePath input image file path
+     * @param quality compression factor for RGB channels
+     * @return WebP image Byte
+     */
     public static byte[] imageFileToWebpByte(String imageFilePath, int quality) {
         try {
 
@@ -57,17 +78,35 @@ public static byte[] imageFileToWebpByte(String imageFilePath, int quality) {
         return null;
     }
 
-
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP Byte
+     * @param imageFile input image file
+     * @param quality compression factor for RGB channels
+     * @return WebP image Byte
+     */
     public static byte[] imageFileToWebpByte(File imageFile, int quality) {
         return imageFileToWebpByte(imageFile.getAbsolutePath(), quality);
     }
 
 
+
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP File
+     * @param imageByte input image byte
+     * @param webpPathFile output webp image path file
+     * @return WebP image File
+     */
     public static File imageByteToWebpFile(byte[] imageByte, String webpPathFile){
         return imageByteToWebpFile(imageByte, webpPathFile,75);
     }
 
-
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP File
+     * @param imageByte input image byte
+     * @param webpPathFile output webp image path file
+     * @param quality compression factor for RGB channels
+     * @return WebP image File
+     */
     public static File imageByteToWebpFile(byte[] imageByte, String webpPathFile, int quality){
         try {
 
@@ -90,7 +129,13 @@ public static File imageByteToWebpFile(byte[] imageByte, String webpPathFile, in
         return null;
     }
 
-
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP File
+     * @param imageFilePath input image file path
+     * @param webpPathFile output webp image path file
+     * @param quality compression factor for RGB channels
+     * @return WebP image File
+     */
     public static File imageFileToWebpFile(String imageFilePath, String webpPathFile, int quality){
         try {
             return getWebpFile(imageFilePath, quality, null, webpPathFile);
@@ -100,12 +145,28 @@ public static File imageFileToWebpFile(String imageFilePath, String webpPathFile
         return null;
     }
 
-
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP File
+     * @param imageFile input image file
+     * @param webpPathFile output webp image path file
+     * @param quality compression factor for RGB channels
+     * @return WebP image File
+     */
     public static File imageFileToWebpFile(File imageFile, String webpPathFile, int quality){
         return imageFileToWebpFile(imageFile.getAbsolutePath(), webpPathFile, quality);
     }
 
 
+
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP Byte
+     * @param imageFilePath input image file path
+     * @param quality compression factor for RGB channels
+     * @param tempDir temp directory for converting
+     * @param output output webp image path file
+     * @return WebP image Byte
+     * @throws IOException handle the exception
+     */
     private static byte[] getWebpBytes(String imageFilePath, int quality, Path tempDir, String output) throws IOException {
         CWebp cwebp = new CWebp().quality(quality).input(imageFilePath).output(output);
         cwebp.execute();
@@ -117,6 +178,15 @@ private static byte[] getWebpBytes(String imageFilePath, int quality, Path tempD
         return webpByte;
     }
 
+    /**
+     * convert PNG, JPEG, TIFF, WebP image to WebP File
+     * @param imageFilePath input image file path
+     * @param quality compression factor for RGB channels
+     * @param tempDir temp directory for converting
+     * @param output output webp image path file
+     * @return WebP image File
+     * @throws IOException handle the exception
+     */
     private static File getWebpFile(String imageFilePath, int quality, Path tempDir, String output) throws IOException {
         CWebp cwebp = new CWebp().quality(quality).input(imageFilePath).output(output);
         cwebp.execute();