Added some missing @param and @throws Javadoc comments.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/itdelatrisu/opsu/downloads/Updater.java

@@ -194,6 +194,7 @@ public class Updater {
 
 	/**
 	 * Checks the program version against the version file on the update server.
+	 * @throws IOException if an I/O exception occurs
 	 */
 	public void checkForUpdates() throws IOException {
 		if (status != Status.INITIAL || Options.USE_XDG)