done task

src/main/java/core/basesyntax/PasswordValidationException.java

@@ -1,3 +1,11 @@
 package core.basesyntax;
 
 //write your code here
+public class PasswordValidationException extends Exception {
+    public PasswordValidationException() {
+    }
+
+    public PasswordValidationException(String message) {
+        super(message);
+    }
+}

src/main/java/core/basesyntax/PasswordValidator.java

@@ -1,7 +1,15 @@
 package core.basesyntax;
 
 public class PasswordValidator {
-    public void validate(String password, String repeatPassword) {
+    public void validate(String password, String repeatPassword) throws
+            PasswordValidationException {
         //write your code here
+        if (password == null || repeatPassword == null) {
+            throw new PasswordValidationException("Passwords cannot be null");
+        }
+
+        if (!password.equals(repeatPassword) || password.length() < 10) {
+            throw new PasswordValidationException("Wrong passwords");
+        }
     }
 }

src/main/java/core/basesyntax/UserService.java

@@ -1,8 +1,14 @@
 package core.basesyntax;
 
-public class UserService {
+public class UserService extends PasswordValidator {
     public void registerUser(User user) {
         //write your code here
+        try {
+            validate(user.getPassword(), user.getRepeatPassword());
+            saveUser(user);
+        } catch (PasswordValidationException e) {
+            System.out.println("Your passwords are incorrect. Try again.");
+        }
     }
 
     public void saveUser(User user) {

src/test/java/core/basesyntax/UserServiceTest.java

@@ -34,7 +34,7 @@ public void afterTest() {
     }
 
     @Test
-    public void registerUser_correctInputData() {
+    public void registerUser_correctInputData() throws PasswordValidationException {
         User user = new User("email@email", "Password#123", "Password#123");
         userService.registerUser(user);
         String actualMessage = outContent.toString().trim();
@@ -44,7 +44,7 @@ public void registerUser_correctInputData() {
     }
 
     @Test
-    public void registerUser_incorrectInputData() {
+    public void registerUser_incorrectInputData() throws PasswordValidationException {
         User user = new User("email@email", "123", "123");
         userService.registerUser(user);
         String actualMessage = outContent.toString().trim();