Trying to not Omit Leading 0's when writing from Int to Hex using buffered writer

Trying to not Omit Leading 0's when writing from Int to Hex using buffered
writer

I create buffered writer
BufferedWriter errorReport = new BufferedWriter(new
FileWriter("ErrorReport.txt"));
Then I wanted to write while converting my integer to a hex.
errorReport.write(Integer.toHexString(version))
This works perfectly, except it omits leading 0's as it writes the minimum
possible length. Say 'version' is a byte in length and simply prints 6.
Well I know the actual value is actually 06. How do I keep these leading
0's?
I tried errorReport.write(String.format("%03x",
Integer.toHexString(version)), but get an error for
illegalFormatConversionException x != java.lang.String