Remove error printing in low level XML helper method

The needless error printing during parsing of a XML document can be
removed since an failed attempt to parse the document will be reported
outside of the XML helper method.

Fixes: #3855 (partly)

1 files changed, 9 insertions, 4 deletions

diff --git a/src/main/java/org/openslx/util/XmlHelper.java b/src/main/java/org/openslx/util/XmlHelper.java
index 4e814a0..6039b7b 100644
--- a/src/main/java/org/openslx/util/XmlHelper.java
+++ b/src/main/java/org/openslx/util/XmlHelper.java
@@ -89,14 +89,19 @@ public class XmlHelper
 	public static Document parseDocumentFromStream( InputStream is )
 	{
 		Document doc = null;
+
+		// read document from stream
 		try {
 			doc = dBuilder.parse( is );
 		} catch ( SAXException | IOException e ) {
-			LOGGER.error( "Failed to parse input stream to document." );
+			doc = null;
 		}
-		if ( doc == null )
-			return null;
-		doc.getDocumentElement().normalize();
+
+		// normalize parsed document
+		if ( doc != null ) {
+			doc.getDocumentElement().normalize();
+		}
+
 		return doc;
 	}