Fixed a few bugs with permissions resolver loading.

src/main/java/com/sk89q/bukkit/migration/NijiPermissionsResolver.java

@@ -34,6 +34,11 @@ public class NijiPermissionsResolver implements PermissionsResolver {
 
     public static PermissionsResolver factory(Server server, YAMLProcessor config) {
         PluginManager pluginManager = server.getPluginManager();
+        try {
+            Class.forName("com.nijikokun.bukkit.Permissions.Permissions");
+        } catch (ClassNotFoundException e) {
+            return null;
+        }
 
         Plugin plugin = pluginManager.getPlugin("Permissions");
 

src/main/java/com/sk89q/bukkit/migration/PermissionsResolverManager.java

@@ -199,7 +199,7 @@ public class PermissionsResolverManager implements PermissionsResolver {
             for (Class<?> clazz : availableResolvers) {
                 if (!stagedEnabled.contains(clazz.getSimpleName()) &&
                         !disabledResolvers.contains(clazz.getSimpleName())) {
-                    disabledResolvers.add(clazz.getName());
+                    disabledResolvers.add(clazz.getSimpleName());
                     logger.info("New permissions resolver: "
                             + clazz.getSimpleName() + " detected. " +
                             "Added to disabled resolvers list.");