Added some missing @param and @throws Javadoc comments.

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

src/itdelatrisu/opsu/downloads/DownloadList.java

@@ -75,7 +75,7 @@ public class DownloadList {
 	}
 
 	/**
-	 * Returns the size of the doownloads list.
+	 * Returns the size of the downloads list.
 	 */
 	public int size() { return nodes.size(); }
 

src/itdelatrisu/opsu/downloads/DownloadNode.java

@@ -218,6 +218,13 @@ public class DownloadNode {
 
 	/**
 	 * Constructor.
+	 * @param beatmapSetID the beatmap set ID
+	 * @param date the last modified date string
+	 * @param title the song title
+	 * @param titleUnicode the Unicode song title (or {@code null} if none)
+	 * @param artist the song artist
+	 * @param artistUnicode the Unicode song artist (or {@code null} if none)
+	 * @param creator the beatmap creator
 	 */
 	public DownloadNode(int beatmapSetID, String date, String title,
 			String titleUnicode, String artist, String artistUnicode, String creator) {

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)