FirstLastSeenToTimeTracker

import java.io.*;



public class ConverterFirstLastSeenToTimeTracker {
    public static void main (String [] args) throws IOException{
                File folder = new File("C:\\Put\\Your\\FirstLastSeen\\Data\\Directory\\Here");
                PrintWriter out = new PrintWriter(new FileWriter("C:\\Put\\Where\\You\\Want\\The\\TimeTracker\\Data.yml"));
                File[] listOfFiles = folder.listFiles();
                String [] first = new String [listOfFiles.length];
                String [] last = new String [listOfFiles.length];
                   for (int i = 0; i < listOfFiles.length; i++)
                       try{
                           if(listOfFiles[i].getName() != null){

                               FileInputStream fstream = new FileInputStream("C:\\Put\\Your\\FirstLastSeen\\Data\\Directory\\Here" + listOfFiles[i].getName());
                               DataInputStream in = new DataInputStream(fstream);
                               BufferedReader br = new BufferedReader(new InputStreamReader(in));
                               String strLine;
                               while((strLine = br.readLine()) != null){
                                   if (strLine.charAt(0) == '#'){
                                       continue;
                                   }
                                   if (strLine.charAt(0) == 'F'){
                                       first[i] = (strLine.substring(10));
                                       strLine = br.readLine();
                                       last[i] = (strLine.substring(9));
                                   }
                               }
                               in.close();
                           }
                       }
            catch (Exception e){
                System.err.println("Error: " + e.getMessage());
            }
                   for(int i = 0; i < listOfFiles.length; i++){
                       out.println(
                               listOfFiles[i].getName() + ": \n" +
                                "  first: " + first[i] +
                                "\n  last: " + last[i] +
                                "\n  playtime: " + 0
                                );
                   }
                    out.close();
        }
    }