@Override
    public ClickHouseOutputStream newOutputStream(int bufferSize, Runnable postCloseAction) {
        if (!hasOutput()) {
            return ClickHouseOutputStream.empty();
        }

        try {
            return ClickHouseOutputStream.wrap(this, new FileOutputStream(getFile()),
                    bufferSize, ClickHouseCompression.NONE, getCompressionLevel(), postCloseAction);
        } catch (FileNotFoundException e) {
            throw new IllegalArgumentException(e);
        }
    }
Null file which has no compression and format.
clickhouse-data/src/main/java/com/clickhouse/data/ClickHouseFile.java