Fix some warnings raised by CheckStyle

- Change ordering of 'static', 'final', etc modifiers according to
  the order suggested by JLS.

- Add comments in empty catch blocks for intentionally ignored
  exceptions.

- Add curly braces around if-else blocks.

- Move `catch` to same line as closing brace of preceding `try`
  blocks.

- Wrap long lines.

Note that this change does not fix all instances of the above errors
across the entire code base.

Change-Id: I24bb9649cc5013c249fa5d84e05322a5cdf2ace6

gerrit-gwtui/src/main/java/com/google/gerrit/client/Dispatcher.java

@@ -895,7 +895,7 @@ public class Dispatcher {
     return token.substring(prefixlen);
   }
 
-  private static abstract class AsyncSplit implements RunAsyncCallback {
+  private abstract static class AsyncSplit implements RunAsyncCallback {
     private final boolean isReloadUi;
     protected final String token;