/** Write the frequency distributions to the corresponding n-gram files. */
private void writeFrequencyDistributionsToNGramFiles(
ConditionalFrequencyDistribution<Integer, String> cfd) throws IOException {
for (int level : cfd.getConditions()) {
if (!ngramWriters.containsKey(level)) {
throw new IOException("No writer for ngram level " + level + " initialized.");
}
writeNGramFile(cfd, level);
}
}
