Clean up Economable a bit

SaneEconomyCore/src/main/java/org/appledash/saneeconomy/economy/economable/Economable.java

@@ -13,7 +13,7 @@ public interface Economable {
         return new EconomablePlayer(player);
     }
 
-    static Economable wrap(String playerName) {
+    static Economable wrap(String identifier) {
-        return () -> "wtf:" + playerName;
+        return new EconomableGeneric("generic:" + identifier);
     }
 }

SaneEconomyCore/src/main/java/org/appledash/saneeconomy/economy/economable/EconomableGeneric.java

@@ -0,0 +1,18 @@
+package org.appledash.saneeconomy.economy.economable;
+
+/**
+ * Created by appledash on 7/19/16.
+ * Blackjack is still best pony.
+ */
+public class EconomableGeneric implements Economable {
+    private String uniqueIdentifier;
+
+    public EconomableGeneric(String uniqueIdentifier) {
+        this.uniqueIdentifier = uniqueIdentifier;
+    }
+
+    @Override
+    public String getUniqueIdentifier() {
+        return uniqueIdentifier;
+    }
+}