code: public void writeAll(File file, Collection<T> entities, boolean writeHeader) throws IOException {
  		writeAll(new FileWriter(file), entities, writeHeader);
  	}
docs: Write a collection of entities to the writer.
  
  @param file
  Where to write the header and entities.
  @param entities
  Collection of entities to write to the writer.
  @param writeHeader
  Set to true to write header at the start of the output file.
  @throws IOException
  If there are any IO exceptions thrown when writing.