code: static public void outputFastaSequenceLengthGFF3(File fastaSequenceFile, File gffFile) throws Exception {
  		LinkedHashMap<String, DNASequence> dnaSequenceList = FastaReaderHelper.readFastaDNASequence(fastaSequenceFile);
  		String fileName = fastaSequenceFile.getName();
  		FileWriter fw = new FileWriter(gffFile);
  		String newLine = System.getProperty("line.separator");
  		fw.write("##gff-version 3" + newLine);
  		for (DNASequence dnaSequence : dnaSequenceList.values()) {
  			String gff3line = dnaSequence.getAccession().getID() + "\t" + fileName + "\t" + "contig" + "\t" + "1" + "\t" + dnaSequence.getBioEnd() + "\t.\t.\t.\tName=" + dnaSequence.getAccession().getID() + newLine;
  			fw.write(gff3line);
  		}
  		fw.close();
  	}
docs: Output a gff3 feature file that will give the length of each scaffold/chromosome in the fasta file.
  Used for gbrowse so it knows length.
  @param fastaSequenceFile
  @param gffFile
  @throws Exception