Program: 184155
Project: 184155
Buggy source:
@SuppressWarnings("String_Node_Str") private static FileWriter getOutFileWriter(){
  String filename=getFileName();
  try {
    FileWriter fw=new FileWriter(filename);
    fw.write("String_Node_Str");
    if (df == null)     fw.write("String_Node_Str");
 else     fw.write(df.startDay);
    fw.write("String_Node_Str");
    if (mf == null)     fw.write("String_Node_Str");
 else     fw.write(mf.startMonth);
    fw.write("String_Node_Str");
    if (yf == null)     fw.write("String_Node_Str");
 else     fw.write(yf.startYear);
    fw.write("String_Node_Str");
    if (df == null)     fw.write("String_Node_Str");
 else     fw.write(df.endDay);
    fw.write("String_Node_Str");
    if (mf == null)     fw.write("String_Node_Str");
 else     fw.write(mf.endMonth);
    fw.write("String_Node_Str");
    if (yf == null)     fw.write("String_Node_Str");
 else     fw.write(yf.endYear);
    fw.write("String_Node_Str");
    if (hf == null)     fw.write("String_Node_Str");
 else     fw.write(hf.startHour + "String_Node_Str");
    fw.write("String_Node_Str");
    if (hf == null)     fw.write("String_Node_Str");
 else     fw.write(hf.endHour + "String_Node_Str");
    GregorianCalendar time=new GregorianCalendar();
    time.setTimeInMillis(System.currentTimeMillis());
    fw.write("String_Node_Str" + time.getTime().toLocaleString() + "String_Node_Str");
    fw.write("String_Node_Str" + environXsize + "String_Node_Str"+ environYsize+ "String_Node_Str");
    fw.write("String_Node_Str" + K + "String_Node_Str");
    fw.write("String_Node_Str" + "String_Node_Str" + "String_Node_Str");
    return fw;
  }
 catch (  IOException e) {
    e.printStackTrace();
  }
  return null;
}

Fixed version (ground truth):
@SuppressWarnings("String_Node_Str") private static FileWriter getOutFileWriter(){
  String filename=getFileName();
  try {
    FileWriter fw=new FileWriter(filename);
    fw.write("String_Node_Str");
    if (df == null)     fw.write("String_Node_Str");
 else     fw.write(Integer.toString(df.startDay));
    fw.write("String_Node_Str");
    if (mf == null)     fw.write("String_Node_Str");
 else     fw.write(Integer.toString(mf.startMonth));
    fw.write("String_Node_Str");
    if (yf == null)     fw.write("String_Node_Str");
 else     fw.write(Integer.toString(yf.startYear));
    fw.write("String_Node_Str");
    if (df == null)     fw.write("String_Node_Str");
 else     fw.write(Integer.toString(df.endDay));
    fw.write("String_Node_Str");
    if (mf == null)     fw.write("String_Node_Str");
 else     fw.write(Integer.toString(mf.endMonth));
    fw.write("String_Node_Str");
    if (yf == null)     fw.write("String_Node_Str");
 else     fw.write(Integer.toString(yf.endYear));
    fw.write("String_Node_Str");
    if (hf == null)     fw.write("String_Node_Str");
 else     fw.write(Integer.toString(hf.startHour) + "String_Node_Str");
    fw.write("String_Node_Str");
    if (hf == null)     fw.write("String_Node_Str");
 else     fw.write(Integer.toString(hf.endHour) + "String_Node_Str");
    GregorianCalendar time=new GregorianCalendar();
    time.setTimeInMillis(System.currentTimeMillis());
    fw.write("String_Node_Str" + time.getTime().toLocaleString() + "String_Node_Str");
    fw.write("String_Node_Str" + environXsize + "String_Node_Str"+ environYsize+ "String_Node_Str");
    fw.write("String_Node_Str" + K + "String_Node_Str");
    fw.write("String_Node_Str" + "String_Node_Str" + "String_Node_Str");
    return fw;
  }
 catch (  IOException e) {
    e.printStackTrace();
  }
  return null;
}