final ProgressLogger progressLogger = new ProgressLogger(LOGGER);
progressLogger.expectedUpdates = files.length;
progressLogger.itemsName = "files";
progressLogger.start("Parsing files with compression \"" + compression
+ "\"");
final DataOutputStream metadataStream = new DataOutputStream(new FileOutputStream(metadataFile));
for (int i = 0; i < files.length; i++) {
parseContent(i, openFileStream(files[i]), metadataStream);