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-launcher/src/main/java/com/google/gerrit/launcher/GerritLauncher.java

@@ -294,8 +294,8 @@ public final class GerritLauncher {
     return name;
   }
 
-  private volatile static File myArchive;
-  private volatile static File myHome;
+  private static volatile File myArchive;
+  private static volatile File myHome;
 
   /**
    * Locate the JAR/WAR file we were launched from.