final LineReader reader = new BufferedLineReader(new FileInputStream(new File(testDataDir, libraryParamsFile)));
final PrintWriter writer = new PrintWriter(libraryParams);
final String header = reader.readLine();
writer.println(header + "\tOUTPUT_PREFIX");
while (true) {
final String line = reader.readLine();
if (line == null) {
break;
}
final String[] fields = line.split("\t");
final File outputPrefix = new File(outputDir, StringUtil.join("", Arrays.copyOfRange(fields, 0, concatNColumnFields)));