Make fields final. Remove protected-modifier in final class

core/src/main/java/com/threerings/getdown/Log.java

@@ -143,5 +143,5 @@ public final class Log
         protected final FieldPosition _fpos = new FieldPosition(SimpleDateFormat.DATE_FIELD);
     }
 
-    protected static final Level[] LEVELS = {Level.FINE, Level.INFO, Level.WARNING, Level.SEVERE};
+    private static final Level[] LEVELS = {Level.FINE, Level.INFO, Level.WARNING, Level.SEVERE};
 }

core/src/main/java/com/threerings/getdown/util/LaunchUtil.java

@@ -198,7 +198,7 @@ public final class LaunchUtil
     /**
      * Checks whether a Java Virtual Machine can be located in the supplied path.
      */
-    protected static String checkJVMPath (String vmhome, boolean windebug)
+    private static String checkJVMPath(String vmhome, boolean windebug)
     {
         String vmbase = vmhome + File.separator + "bin" + File.separator;
         String vmpath = vmbase + "java";
@@ -222,11 +222,11 @@ public final class LaunchUtil
     }
 
     /** Flag indicating that we're on Windows; initialized when this class is first loaded. */
-    protected static boolean _isWindows;
+    private static boolean _isWindows;
     /** Flag indicating that we're on MacOS; initialized when this class is first loaded. */
-    protected static boolean _isMacOS;
+    private static boolean _isMacOS;
     /** Flag indicating that we're on Linux; initialized when this class is first loaded. */
-    protected static boolean _isLinux;
+    private static boolean _isLinux;
 
     static {
         try {

core/src/main/java/com/threerings/getdown/util/MessageUtil.java

@@ -140,5 +140,5 @@ public final class MessageUtil {
 
     /** Text prefixed by this character will be considered tainted when doing recursive
      * translations and won't be translated. */
-    protected static final String TAINT_CHAR = "~";
+    private static final String TAINT_CHAR = "~";
 }

core/src/test/java/com/threerings/getdown/cache/ResourceCacheTest.java

@@ -75,7 +75,7 @@ public class ResourceCacheTest
         assertTrue(lastAccessedFile.lastModified() > lastAccessed);
     }
 
-    @Rule public TemporaryFolder _folder = new TemporaryFolder();
+    @Rule public final TemporaryFolder _folder = new TemporaryFolder();
 
     private File _fileToCache;
     private ResourceCache _cache;