Get placeholders working

Core/src/main/java/com/plotsquared/core/IPlotMain.java

@@ -270,6 +270,11 @@ public interface IPlotMain<P> extends ILogger {
      */
     void registerWorldEvents();
 
+    /**
+     * Register events related to the server
+     */
+    void registerServerEvents();
+
     /**
      * Usually HybridGen
      *

Core/src/main/java/com/plotsquared/core/PlotSquared.java

@@ -262,6 +262,7 @@ public class PlotSquared {
                 this.IMP.registerPlayerEvents();
             }
             // Required
+            this.IMP.registerServerEvents();
             this.IMP.registerWorldEvents();
             if (Settings.Enabled_Components.CHUNK_PROCESSOR) {
                 this.IMP.registerChunkProcessor();

Core/src/main/java/com/plotsquared/core/util/placeholders/PlaceholderRegistry.java

@@ -159,7 +159,7 @@ public final class PlaceholderRegistry {
         final Placeholder previous = this.placeholders
             .put(placeholder.getKey().toLowerCase(Locale.ENGLISH),
                 Preconditions.checkNotNull(placeholder, "Placeholder may not be null"));
-        if (previous != null) {
+        if (previous == null) {
             this.eventDispatcher.callGenericEvent(new PlaceholderAddedEvent(placeholder));
         }
     }