PARQUET-2472: Close in finally block in ParquetFileWriter#end (apache…

…#1350)

It's currently possible that ParquetFileWriter#end fails when
writing out the footer, and we don't clean up resources.
This change addresses this by explicitly closing the output stream
in the finally block.

parquet-hadoop/src/main/java/org/apache/parquet/hadoop/ParquetFileWriter.java

@@ -1643,14 +1643,17 @@ private static void copy(SeekableInputStream from, PositionOutputStream to, long
    * @throws IOException if there is an error while writing
    */
   public void end(Map<String, String> extraMetaData) throws IOException {
-    state = state.end();
-    serializeColumnIndexes(columnIndexes, blocks, out, fileEncryptor);
-    serializeOffsetIndexes(offsetIndexes, blocks, out, fileEncryptor);
-    serializeBloomFilters(bloomFilters, blocks, out, fileEncryptor);
-    LOG.debug("{}: end", out.getPos());
-    this.footer = new ParquetMetadata(new FileMetaData(schema, extraMetaData, Version.FULL_VERSION), blocks);
-    serializeFooter(footer, out, fileEncryptor, metadataConverter);
-    close();
+    try {
+      state = state.end();
+      serializeColumnIndexes(columnIndexes, blocks, out, fileEncryptor);
+      serializeOffsetIndexes(offsetIndexes, blocks, out, fileEncryptor);
+      serializeBloomFilters(bloomFilters, blocks, out, fileEncryptor);
+      LOG.debug("{}: end", out.getPos());
+      this.footer = new ParquetMetadata(new FileMetaData(schema, extraMetaData, Version.FULL_VERSION), blocks);
+      serializeFooter(footer, out, fileEncryptor, metadataConverter);
+    } finally {
+      close();
+    }
   }
 
   @Override