Поток для чтения должен быть закрыт

public class Solution{
    public static void main(String[] args) throws IOException {


      try {
          BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
          String filename = br.readLine();


          File f = new File(filename);
          FileInputStream fstream = new FileInputStream(filename);
          BufferedReader fin = new BufferedReader(new InputStreamReader(fstream));

          String line;


          while ((line = fin.readLine()) != null) {
              System.out.println(line);
          }

          fstream.close();
          br.close();
          fin.close();
      } catch (IOException e){ e.printStackTrace();}

    }
}