CSV Excel - Double Click Issue

So here I am again, with a fix for another issue which I tried to resolve with my colleague the other day.

Problem Statement:
We used CSVWriter to write CSV file's and on double clicking it; excel was not showing the special characters, to be precise korean characters. However if we were opening the same file in Notepad characters were rendering properly.

Issue:
The CSV file was getting generated without BOM(Byte Order Mark). BOM is nothing but the Unicode character used to signal the byte order of the text file or stream. Its code point is U+FEFF. BOM use is optional, and, if used, should appear at the start of the text stream

I detected this issue when I opened the file in Notepad++ and found "UTF8 without BOM" option was selected under "Format" menu. I then changed the format to "UTF8" and saved a copy of the file. Double click the file and Excel rendered all the korean characters.

Click here to read more on Byte Order Mark.

Fix:
We added below mentioned three statements to have BOM character at the start of the file. That's it.

OutputStream fos = new FileOutputStream("c:/test.csv");
//Write BOM Characters
fos.write(239); //0xEF
fos.write(187); //0xBB
fos.write(191); //0xBF

PrintWriter writer = new PrintWriter(new OutputStreamWriter(fos, "UTF-8"));
//Write all the required contents.

writer.close();
fos.close();

Thanks !!!