PDFBOX-5660: close input, as suggested by Valery Bokov; closes #344

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1929857 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

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

@@ -292,7 +292,7 @@ void testPDFBox5955() throws IOException
      * @throws IOException If there is an unexpected error during the test.
      */
     @Test
-    void testProtectionInnerAttachment() throws IOException
+    void testProtectionInnerAttachmetn() throws IOException
     {
         String testFileName = "preEnc_20141025_105451.pdf";
         byte[] inputFileWithEmbeddedFileAsByteArray = getFileResourceAsByteArray(testFileName);
@@ -535,7 +535,10 @@ private void testSymmEncrForKeySizeInner(int keyLength, boolean preferAES,
 
     private byte[] getFileResourceAsByteArray(String testFileName) throws IOException
     {
-        return TestSymmetricKeyEncryption.class.getResourceAsStream(testFileName).readAllBytes();
+        try (InputStream is = TestSymmetricKeyEncryption.class.getResourceAsStream(testFileName))
+        {
+            return is.readAllBytes();
+        }
     }
 
     private byte[] getFileAsByteArray(File f) throws IOException