PDFBOX-5660: Sonar fix

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1924905 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/test/java/org/apache/pdfbox/encryption/TestPublicKeyEncryption.java

@@ -168,11 +168,9 @@ void testProtectionError(int keyLength) throws Exception
         policy.setEncryptionKeyLength(keyLength);
         document.protect(policy);
 
-        PDDocument encryptedDoc = null;
-        try 
+        File file = save("testProtectionError");
+        try (PDDocument encryptedDoc = reload(file, password2, getKeyStore(keyStore2)))
         {
-            File file = save("testProtectionError");
-            encryptedDoc = reload(file, password2, getKeyStore(keyStore2));
             assertTrue(encryptedDoc.isEncrypted());
             fail("No exception when using an incorrect decryption key");
         }
@@ -181,13 +179,6 @@ void testProtectionError(int keyLength) throws Exception
             String msg = ex.getMessage();
             assertTrue(msg.contains("serial-#: rid 2 vs. cert 3"), "not the expected exception: " + msg);
         }
-        finally 
-        {
-            if (encryptedDoc != null)
-            {
-                encryptedDoc.close();
-            }
-        }
     }