LUCENE-1251: be sure to close the descriptor even if super.close() hits an exception, in FSIndexOutput.close

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@642339 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/lucene/store/FSDirectory.java

@@ -634,9 +634,21 @@ public class FSDirectory extends Directory {
     public void close() throws IOException {
       // only close the file if it has not been closed yet
       if (isOpen) {
+        boolean success = false;
+        try {
           super.close();
-        file.close();
+          success = true;
+        } finally {
           isOpen = false;
+          if (!success) {
+            try {
+              file.close();
+            } catch (Throwable t) {
+              // Suppress so we don't mask original exception
+            }
+          } else
+            file.close();
+        }
       }
     }