Fixed a few tile network creation issues

src/dark/core/prefab/tilenetwork/fluid/NetworkFluidContainers.java

@@ -23,6 +23,11 @@ public class NetworkFluidContainers extends NetworkFluidTiles
         NetworkUpdateHandler.registerNetworkClass("FluidContainers", NetworkFluidContainers.class);
     }
 
+    public NetworkFluidContainers()
+    {
+        super();
+    }
+
     public NetworkFluidContainers(INetworkPart... parts)
     {
         super(parts);

src/dark/core/prefab/tilenetwork/fluid/NetworkFluidTiles.java

@@ -34,6 +34,11 @@ public class NetworkFluidTiles extends NetworkTileEntities
         NetworkUpdateHandler.registerNetworkClass("FluidTiles", NetworkFluidTiles.class);
     }
 
+    public NetworkFluidTiles()
+    {
+        super();
+    }
+
     public NetworkFluidTiles(INetworkPart... parts)
     {
         super(parts);
@@ -223,6 +228,8 @@ public class NetworkFluidTiles extends NetworkTileEntities
     protected void mergeDo(ITileNetwork network)
     {
         ITileNetwork newNetwork = NetworkUpdateHandler.createNewNetwork(NetworkUpdateHandler.getID(this.getClass()));
+        if (newNetwork != null)
+        {
             if (newNetwork instanceof NetworkFluidTiles)
             {
                 FluidStack one = this.getNetworkTank().getFluid();
@@ -238,6 +245,11 @@ public class NetworkFluidTiles extends NetworkTileEntities
             newNetwork.getMembers().addAll(network.getMembers());
             newNetwork.onCreated();
         }
+        else
+        {
+            System.out.println("[NetworkFluidTiles] Failed to merge network due to the new network returned null");
+        }
+    }
 
     @Override
     public void cleanUpMembers()

src/dark/core/prefab/tilenetwork/fluid/NetworkPipes.java

@@ -26,6 +26,11 @@ public class NetworkPipes extends NetworkFluidTiles
         NetworkUpdateHandler.registerNetworkClass("FluidPipes", NetworkPipes.class);
     }
 
+    public NetworkPipes()
+    {
+        super();
+    }
+
     public NetworkPipes(INetworkPart... parts)
     {
         super(parts);