PMD fixes

Author: coheigea

src/main/java/org/apache/jcp/xml/dsig/internal/dom/DOMReference.java

@@ -663,14 +663,13 @@ private static Data copyDerefData(Data dereferencedData) {
 
     private static void close(Closeable... closeables) throws XMLSignatureException {
         XMLSignatureException collector = new XMLSignatureException("Close failed!");
-        for (Closeable closeable : closeables) {
-            if (closeable == null) {
-                continue;
-            }
-            try {
-                closeable.close();
-            } catch (IOException e) {
-                collector.addSuppressed(e);
+        for (Closeable closeable : closeables) { //NOPMD
+            if (closeable != null) {
+                try {
+                    closeable.close();
+                } catch (IOException e) {
+                    collector.addSuppressed(e);
+                }
             }
         }
         if (collector.getSuppressed().length > 0) {

src/test/java/org/apache/xml/security/test/dom/algorithms/SignatureAlgorithmTest.java

@@ -103,7 +103,7 @@ void testSameKeySeveralAlgorithmSigning() throws Exception {
     @Test
     void testConstructionWithProvider() throws Exception {
         Field algorithmHashField = SignatureAlgorithm.class.getDeclaredField("algorithmHash");
-        algorithmHashField.setAccessible(true);
+        algorithmHashField.setAccessible(true); //NOPMD
         @SuppressWarnings("unchecked")
         Map<String, Class<?>> algorithmHash = (Map<String, Class<?>>)algorithmHashField.get(null);
         assertFalse(algorithmHash.isEmpty());