Bug DF2004 - rot13 - Java

java.io.IOException: No such file or directory
    at java.io.FileInputStream.close0(Native Method)
    at java.io.FileInputStream.close(FileInputStream.java:245)
    at java.io.BufferedInputStream.close(BufferedInputStream.java:440)
    at sun.nio.cs.StreamDecoder$CharsetSD.implClose(StreamDecoder.java:505)
    at sun.nio.cs.StreamDecoder.close(StreamDecoder.java:198)
    at java.io.InputStreamReader.close(InputStreamReader.java:187)
    at java.io.BufferedReader.close(BufferedReader.java:502)
    at tmp_SUWeP10851.main(tmp_SUWeP10851.java:44)