added javadoc

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

src/com/company/Client.java

@@ -6,6 +6,9 @@ import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.net.Socket;
 
+/**
+ * client class has a main method takes input from system and reads and writes to the socket data stream
+ */
 public class Client {
     public static void main(String[] args) {
         try {

src/com/company/ClientHandler.java

@@ -8,6 +8,9 @@ import java.net.Socket;
 import java.security.PrivateKey;
 import java.util.ArrayList;
 
+/**
+ * a class that extends thread we use it to hndle multiple clients
+ */
 public class ClientHandler extends Thread{
 
     private BufferedReader reader;

src/com/company/Server.java

@@ -3,6 +3,9 @@ package com.company;
 import java.io.IOException;
 import java.net.ServerSocket;
 
+/**
+ * server class for handling clients
+ */
 public class Server {
 
     public static void main(String[] args) {