Added some comments

Author: Madhavan7

src/main/java/screens/login_screen/UserLoginUI.java

@@ -8,7 +8,7 @@
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.io.File;
-
+/** This is the screen on which the user enters his credentials in order to login **/
 public class UserLoginUI implements ActionListener {
 
     private JTextField credentialText;

src/main/java/screens/user_registration_screen/LoginRegisterScreen.java

@@ -8,6 +8,7 @@
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 
+/** This is the screen in which the user chooses to either register or login. **/
 public class LoginRegisterScreen implements ActionListener {
 
     JButton login = new JButton("login");

src/main/java/screens/user_registration_screen/UserRegistrationUI.java

@@ -9,7 +9,7 @@
 import java.awt.event.ActionListener;
 import java.io.File;
 import java.util.Random;
-
+/** This is screen on which the User enters his credentials in order to login**/
 public class UserRegistrationUI implements ActionListener {
     private final UserDatabase database;
     private JLabel registrationSuccess;