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-prettify/src/main/java/com/google/gerrit/prettify/client/PrettyFormatter.java

@@ -28,7 +28,7 @@ import java.util.List;
 import java.util.Set;
 
 public abstract class PrettyFormatter implements SparseHtmlFile {
-  public static abstract class EditFilter {
+  public abstract static class EditFilter {
     abstract String getStyleName();
 
     abstract int getBegin(Edit edit);