in chill-java/src/main/java/com/twitter/chill/Base64.java [2001:2012]
public void flushBase64() throws java.io.IOException {
if( position > 0 ) {
if( encode ) {
out.write( encode3to4( b4, buffer, position, options ) );
position = 0;
} // end if: encoding
else {
throw new java.io.IOException( "Base64 input not properly padded." );
} // end else: decoding
} // end if: buffer partially full
} // end flush