HashSets for starters.

src/engine/ConfigParsing/EffectEntry/Mod.java

@@ -0,0 +1,10 @@
+package engine.ConfigParsing.EffectEntry;
+
+import engine.mbEnums;
+
+import java.util.ArrayList;
+
+public class Mod {
+    public mbEnums.ModType type;
+    public ArrayList<String> values;
+}