Added some missing @param and @throws Javadoc comments.

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

src/itdelatrisu/opsu/io/OsuReader.java

@@ -61,6 +61,7 @@ public class OsuReader {
 
 	/**
 	 * Closes the input stream.
+	 * @throws IOException if an I/O error occurs
 	 */
 	public void close() throws IOException { reader.close(); }
 

src/itdelatrisu/opsu/io/OsuWriter.java

@@ -62,7 +62,7 @@ public class OsuWriter {
 
 	/**
 	 * Closes the output stream.
-	 * @throws IOException
+	 * @throws IOException if an I/O error occurs
 	 */
 	public void close() throws IOException { writer.close(); }