Will solve tasks from README file

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

@@ -1,7 +1,14 @@
 package core.basesyntax;
 
+import core.basesyntax.exceptions.PasswordValidationException;
+
 public class PasswordValidator {
-    public void validate(String password, String repeatPassword) {
-        //write your code here
+    public void validate(String password, String repeatPassword)
+            throws PasswordValidationException {
+        if (password == null
+                || password.length() < 10
+                || !password.equals(repeatPassword)) {
+            throw new PasswordValidationException("Wrong passwords");
+        }
     }
 }

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

@@ -1,11 +1,21 @@
 package core.basesyntax;
 
+import core.basesyntax.exceptions.PasswordValidationException;
+
 public class UserService {
+    private final PasswordValidator passwordValidator = new PasswordValidator();
+
     public void registerUser(User user) {
-        //write your code here
+        try {
+            passwordValidator.validate(user.getPassword(), user.getRepeatPassword());
+            saveUser(user);
+        } catch (PasswordValidationException e) {
+            System.out.println("Your passwords are incorrect. Try again.");
+        }
     }
 
     public void saveUser(User user) {
         System.out.println("User " + user.toString() + " was saved to database!!!");
+
     }
 }

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

@@ -0,0 +1,7 @@
+package core.basesyntax.exceptions;
+
+public class PasswordValidationException extends Exception {
+    public PasswordValidationException(String message) {
+        super(message);
+    }
+}

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

@@ -1,5 +1,6 @@
 package core.basesyntax;
 
+import core.basesyntax.exceptions.PasswordValidationException;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;