public void close() throws IOException {
    liveFileWriter.appendFileInfo(HISTORICAL_KEY, Bytes.toBytes(false));
    liveFileWriter.close();
    if (historicalFileWriter != null) {
      historicalFileWriter.appendFileInfo(HISTORICAL_KEY, Bytes.toBytes(true));
      historicalFileWriter.close();
    }
  }
For unit testing only.
@return the Bloom filter used by this writer.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileWriter.java