Various minor style fixes

src/com/dmdirc/parser/common/CallbackManager.java

  */
 public abstract class CallbackManager<T extends Parser> {
 
-    protected static final Class[] CLASSES = {
+    static final Class[] CLASSES = {
         AwayStateListener.class, OtherAwayStateListener.class,
         ChannelOtherAwayStateListener.class, ChannelActionListener.class,
         ChannelCtcpListener.class, ChannelCtcpReplyListener.class,

src/com/dmdirc/parser/irc/IRCCallbackObject.java

 public class IRCCallbackObject extends CallbackObject {
 
     /** A map of interfaces to the classes which should be instansiated for them. */
-    protected static Map<Class<?>, Class<?>> IMPL_MAP = new HashMap<Class<?>, Class<?>>();
+    protected static final Map<Class<?>, Class<?>> IMPL_MAP = new HashMap<Class<?>, Class<?>>();
 
     static {
         IMPL_MAP.put(ChannelClientInfo.class, IRCChannelClientInfo.class);

src/com/dmdirc/parser/irc/IRCCallbackObjectSpecific.java

 public class IRCCallbackObjectSpecific extends CallbackObjectSpecific {
 
     /** A map of interfaces to the classes which should be instansiated for them. */
-    protected static Map<Class<?>, Class<?>> IMPL_MAP = new HashMap<Class<?>, Class<?>>();
+    protected static final Map<Class<?>, Class<?>> IMPL_MAP = new HashMap<Class<?>, Class<?>>();
 
     static {
         IMPL_MAP.put(ChannelClientInfo.class, IRCChannelClientInfo.class);