Make CustomAnvil, mostly, work with legacy EcoEnchants

impl/LegacyEcoEnchant/src/main/java/com/willfp/ecoenchants/enchantments/EcoEnchant.java

@@ -0,0 +1,26 @@
+package com.willfp.ecoenchants.enchantments;
+
+import com.willfp.ecoenchants.enchantments.meta.EnchantmentTarget;
+import org.bukkit.enchantments.Enchantment;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Set;
+
+/**
+ * Mock class for legacy package of eco enchants
+ */
+public class EcoEnchant {
+
+    public boolean getConflictsWithEverything() {
+        return false;
+    }
+
+    public boolean conflictsWith(@NotNull Enchantment enchant) {
+        return false;
+    }
+
+    public Set<EnchantmentTarget> getTargets() {
+        return null;
+    }
+
+}

impl/LegacyEcoEnchant/src/main/java/com/willfp/ecoenchants/enchantments/EcoEnchants.java

@@ -0,0 +1,14 @@
+package com.willfp.ecoenchants.enchantments;
+
+import java.util.List;
+
+/**
+ * Mock class for legacy package of eco enchants
+ */
+public class EcoEnchants {
+
+    public static List<EcoEnchant> values(){
+        return null; // We don't care here.
+    }
+
+}

impl/LegacyEcoEnchant/src/main/java/com/willfp/ecoenchants/enchantments/meta/EnchantmentTarget.java

@@ -0,0 +1,16 @@
+package com.willfp.ecoenchants.enchantments.meta;
+
+import org.bukkit.Material;
+
+import java.util.Set;
+
+/**
+ * Mock class for legacy package of eco enchants
+ */
+public class EnchantmentTarget {
+
+    public Set<Material> getMaterials() {
+        return null;
+    }
+
+}