Damnit.. Forgot to commit the implementations.....

src/me/tychsen/enchantgui/Economy/MoneyPayment.java

@@ -0,0 +1,48 @@
+package me.tychsen.enchantgui.Economy;
+
+import me.tychsen.enchantgui.Main;
+import net.milkbowl.vault.economy.Economy;
+import net.milkbowl.vault.economy.EconomyResponse;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.RegisteredServiceProvider;
+import org.bukkit.plugin.java.JavaPlugin;
+
+public class MoneyPayment implements PaymentStrategy {
+    private Economy econ = null;
+    private JavaPlugin plugin;
+
+    public MoneyPayment() {
+        this.plugin = Main.getInstance();
+
+        if (!setupEconomy()) {
+            plugin.getLogger().severe("Dependency (Vault) not found. Disabling the plugin!");
+            plugin.getServer().getPluginManager().disablePlugin(plugin);
+        }
+    }
+
+    public boolean withdraw(Player p, int amount) {
+        EconomyResponse r = econ.withdrawPlayer(p, amount);
+
+        if (r.transactionSuccess())
+            return true;
+        else
+            return false;
+    }
+
+    private boolean setupEconomy() {
+        if (plugin.getServer().getPluginManager().getPlugin("Vault") == null) {
+            return false;
+        }
+        RegisteredServiceProvider<Economy> rsp = plugin.getServer().getServicesManager().getRegistration(Economy.class);
+        if (rsp == null) {
+            return false;
+        }
+        econ = rsp.getProvider();
+        return econ != null;
+    }
+
+    @Override
+    public boolean hasSufficientFunds(Player p, int amount) {
+        return econ.has(p, amount);
+    }
+}

src/me/tychsen/enchantgui/Economy/NullPayment.java

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+package me.tychsen.enchantgui.Economy;
+
+import org.bukkit.entity.Player;
+
+/**
+ * Used to disable payment.
+ */
+public class NullPayment implements PaymentStrategy {
+    @Override
+    public boolean withdraw(Player p, int amount) {
+        return true;
+    }
+
+    @Override
+    public boolean hasSufficientFunds(Player p, int amount) {
+        return true;
+    }
+}