Some generic and other warning cleanups

src/main/java/net/minecraftforge/common/UsernameCache.java

@@ -48,7 +48,7 @@ public final class UsernameCache {
 
     /**
      * Set a player's current username
-     * 
+     *
      * @param uuid
      *            the player's {@link java.util.UUID UUID}
      * @param username
@@ -67,7 +67,7 @@ public final class UsernameCache {
 
     /**
      * Remove a player's username from the cache
-     * 
+     *
      * @param uuid
      *            the player's {@link java.util.UUID UUID}
      * @return if the cache contained the user
@@ -81,7 +81,7 @@ public final class UsernameCache {
             save();
             return true;
         }
-        
+
         return false;
     }
 
@@ -89,7 +89,7 @@ public final class UsernameCache {
      * Get the player's last known username
      * <p>
      * <b>May be <code>null</code></b>
-     * 
+     *
      * @param uuid
      *            the player's {@link java.util.UUID UUID}
      * @return the player's last known username, or <code>null</code> if the
@@ -104,7 +104,7 @@ public final class UsernameCache {
 
     /**
      * Check if the cache contains the given player's username
-     * 
+     *
      * @param uuid
      *            the player's {@link java.util.UUID UUID}
      * @return if the cache contains a username for the given player
@@ -117,7 +117,7 @@ public final class UsernameCache {
 
     /**
      * Get an immutable copy of the cache's underlying map
-     * 
+     *
      * @return the map
      */
     public static Map<UUID, String> getMap()
@@ -144,7 +144,7 @@ public final class UsernameCache {
         {
 
             String json = Files.toString(saveFile, charset);
-            Type type = new TypeToken<Map<UUID, String>>() {}.getType();
+            Type type = new TypeToken<Map<UUID, String>>() { private static final long serialVersionUID = 1L; }.getType();
 
             map = gson.fromJson(json, type);
         }