Added lots of 'final' modifiers to class fields where applicable.

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

src/itdelatrisu/opsu/downloads/Download.java

@@ -61,7 +61,7 @@ public class Download {
 		ERROR ("Error");
 
 		/** The status name. */
-		private String name;
+		private final String name;
 
 		/**
 		 * Constructor.

src/itdelatrisu/opsu/downloads/Updater.java

@@ -77,7 +77,7 @@ public class Updater {
 		UPDATE_FINAL ("Update queued.");
 
 		/** The status description. */
-		private String description;
+		private final String description;
 
 		/**
 		 * Constructor.