Java command line program that loops over stdin

Stdin.java

import java.io.*;

public class StdinLoop {

  public static void main(String[] args) {
    BufferedReader br = null;
    try {
      br = new BufferedReader(new InputStreamReader(System.in));
      String line;
      while ((line = br.readLine()) != null) {
        // log message
        System.err.println("[DEBUG] current line is: " + line);
        // program output
        System.out.println(line);
      }
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      if (br != null) {
        try {
          br.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
  }
}