Realization of task

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

@@ -1,11 +1,9 @@
 package core.basesyntax;
 
-public class PasswordValidationException extends Exception {
-    PasswordValidationException() {
-        super();
-    }
+import java.io.IOException;
 
-    PasswordValidationException(String message) {
+public class PasswordValidationException extends IOException {
+    public PasswordValidationException(String message) {
         super(message);
     }
 }

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

@@ -1,12 +1,14 @@
 package core.basesyntax;
 
 public class PasswordValidator {
+    private static final String ERROR_MESSAGE = "Wrong passwords";
+
     public void validate(String password, String repeatPassword)
             throws PasswordValidationException {
         if (((password == null && repeatPassword == null) || password.length() == 0)
                 || (password.equals(repeatPassword) && password.length() < 10)
                 || !password.equals(repeatPassword)) {
-            throw new PasswordValidationException("Wrong passwords");
+            throw new PasswordValidationException(ERROR_MESSAGE);
         }
     }
 }