fixed PMD violation: Avoid empty catch blocks (just logged exception, see in the comment why)

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/digester/trunk@1187557 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/commons/digester3/Digester.java b/src/main/java/org/apache/commons/digester3/Digester.java
index feec70d..a983756 100644
--- a/src/main/java/org/apache/commons/digester3/Digester.java
+++ b/src/main/java/org/apache/commons/digester3/Digester.java
@@ -2911,6 +2911,12 @@
             catch ( IOException e )
             {
                 // Fall through so we get them all
+                if ( log.isWarnEnabled() )
+                {
+                    log.warn( format( "An error occurred while closing resource %s (%s)",
+                                      source.getPublicId(),
+                                      source.getSystemId() ), e );
+                }
             }
         }
         inputSources.clear();