minor FIXME resolved: HierarchicalContent is also closed when an I/O error occurs

SVN: 21515

datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/server/ftp/resolver/FtpFileImpl.java

@@ -68,17 +68,22 @@ public class FtpFileImpl extends AbstractFtpFile
     public InputStream createInputStream(long offset) throws IOException
     {
         IHierarchicalContent content = createHierarchicalContent();
-        IHierarchicalContentNode contentNode = getContentNodeForThisFile(content);
-
-        InputStream result =
-                HierarchicalContentUtils.getInputStreamAutoClosingContent(contentNode, content);
+        try
+        {
+            IHierarchicalContentNode contentNode = getContentNodeForThisFile(content);
+            InputStream result =
+                    HierarchicalContentUtils.getInputStreamAutoClosingContent(contentNode, content);
 
-        if (offset > 0)
+            if (offset > 0)
+            {
+                result.skip(offset);
+            }
+            return result;
+        } catch (IOException ioex)
         {
-            result.skip(offset);
+            content.close();
+            return null;
         }
-        return result;
-        // FIXME content is not closed if exception occurs
     }
 
     public long getLastModified()