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-server/src/main/java/com/google/gerrit/common/ChangeHookRunner.java

@@ -924,8 +924,7 @@ public class ChangeHookRunner implements ChangeHooks, LifecycleListener {
           while ((line = br.readLine()) != null) {
             log.info("hook[" + getName() + "] output: " + line);
           }
-        }
-        catch(IOException  iox) {
+        } catch (IOException iox) {
           log.error("Error writing hook output", iox);
         }
       }