AbstractMarshaller uses general exception message in extracted buildDocument() method

Issue: SPR-11635
(cherry picked from commit f7a17ad)

Author: jhoeller

spring-oxm/src/main/java/org/springframework/oxm/support/AbstractMarshaller.java

@@ -99,7 +99,8 @@ public boolean isProcessExternalEntities() {
 
 
 	/**
-	 * Build a new {@link Document} from this marshaller's {@link DocumentBuilderFactory}.
+	 * Build a new {@link Document} from this marshaller's {@link DocumentBuilderFactory},
+	 * as a placeholder for a DOM node.
 	 * @see #createDocumentBuilderFactory()
 	 * @see #createDocumentBuilder(DocumentBuilderFactory)
 	 */
@@ -114,8 +115,7 @@ protected Document buildDocument() {
 			return documentBuilder.newDocument();
 		}
 		catch (ParserConfigurationException ex) {
-			throw new UnmarshallingFailureException(
-					"Could not create document placeholder for DOMSource: " + ex.getMessage(), ex);
+			throw new UnmarshallingFailureException("Could not create document placeholder: " + ex.getMessage(), ex);
 		}
 	}