Fix reporting of economy backend to bStats

Essentials/src/com/earth2me/essentials/metrics/MetricsWrapper.java

@@ -65,8 +65,13 @@ public class MetricsWrapper {
         metrics.addCustomChart(new Metrics.DrilldownPie("econPlugin", () -> {
             Map<String, Map<String, Integer>> result = new HashMap<>();
             Map<String, Integer> backend = new HashMap<>();
-            backend.put(Methods.getMethod().getPlugin().getName(), 1);
-            result.put(Methods.getMethod().getName(), backend);
+            if (Methods.hasMethod()) {
+                backend.put(Methods.getMethod().getBackend(), 1);
+                result.put(Methods.getMethod().getName(), backend);
+            } else {
+                backend.put("Essentials", 1);
+                result.put("Essentials", backend);
+            }
             return result;
         }));
     }

Essentials/src/com/earth2me/essentials/register/payment/Method.java

@@ -33,6 +33,13 @@ public interface Method {
      */
     String getName();
 
+    /**
+     * Returns the backend plugin of this economy method, if applicable.
+     *
+     * @return <code>String</code> Plugin name.
+     */
+    String getBackend();
+
     /**
      * Returns the reported name of this method.
      *

Essentials/src/com/earth2me/essentials/register/payment/methods/VaultEco.java

@@ -29,13 +29,14 @@ public class VaultEco implements Method {
         return this.vault.getDescription().getName();
     }
 
-    public String getEconomy() {
+    @Override
+    public String getBackend() {
         return economy == null ? "NoEco" : economy.getName();
     }
 
     @Override
     public String getLongName() {
-        return getName().concat(" - Economy: ").concat(getEconomy());
+        return getName().concat(" - Economy: ").concat(getBackend());
     }
 
     @Override