Created a simple Selective fluid tank prefab

Still need to do more work to make it selective when working with non FM
blocks. Right now it simple contains a basic fluid allow list.

src/dark/core/prefab/FluidSelectiveTank.java

@@ -0,0 +1,60 @@
+package dark.core.prefab;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import net.minecraftforge.fluids.Fluid;
+import net.minecraftforge.fluids.FluidStack;
+import net.minecraftforge.fluids.FluidTank;
+
+/** Selective fluid version of the FluidTank
+ *
+ * @author DarkGuardsman */
+public class FluidSelectiveTank extends FluidTank
+{
+    protected List<Fluid> fluidList = new ArrayList<Fluid>();
+
+    public FluidSelectiveTank(int capacity)
+    {
+        super(capacity);
+    }
+
+    public FluidSelectiveTank(FluidStack stack, int capacity)
+    {
+        super(stack, capacity);
+    }
+
+    public FluidSelectiveTank(Fluid fluid, int amount, int capacity)
+    {
+        super(fluid, amount, capacity);
+    }
+
+    public FluidSelectiveTank setFluidList(List<Fluid> fluid)
+    {
+        this.fluidList = fluid;
+        return this;
+    }
+
+    public FluidSelectiveTank addFluidToList(Fluid fluid)
+    {
+        if (fluid != null)
+        {
+            this.getList().add(fluid);
+        }
+        return this;
+    }
+
+    public List<Fluid> getList()
+    {
+        if (this.fluidList == null)
+        {
+            this.fluidList = new ArrayList<Fluid>();
+        }
+        return this.fluidList;
+    }
+
+    public boolean canAcceptFluid(Fluid fluid)
+    {
+        return fluid != null && this.getList().contains(fluid);
+    }
+}