Multitileentity precursor (#963)

* Refactors
* Refactor CoverableTileEntity a bit more, pull out a CommonMetaTileEntity
* Add an IDebugableTileEntity interface instead of checking various subclasses
* Move more redstone related things  to CoverableTileEntity
* Add IGTENet

* Final and dead code removal

* Address a few comments, fix a few comments, remove some more dead code, and add some more finals.

* fix bad rebase

3 files changed, 9 insertions, 7 deletions

diff --git a/src/main/java/gregtech/common/covers/GT_Cover_FacadeAE.java b/src/main/java/gregtech/common/covers/GT_Cover_FacadeAE.java
index 592b6f322d..a227d3f530 100644
--- a/src/main/java/gregtech/common/covers/GT_Cover_FacadeAE.java
+++ b/src/main/java/gregtech/common/covers/GT_Cover_FacadeAE.java
@@ -8,14 +8,16 @@ import net.minecraft.item.ItemStack;
 public class GT_Cover_FacadeAE extends GT_Cover_FacadeBase {
 	@Override
 	protected Block getTargetBlock(ItemStack aFacadeStack) {
-		Item item = aFacadeStack.getItem();
+		if(aFacadeStack == null) return null;
+		final Item item = aFacadeStack.getItem();
 		if (!(item instanceof IFacadeItem)) return null;
 		return ((IFacadeItem) item).getBlock(aFacadeStack);
 	}
 
 	@Override
 	protected int getTargetMeta(ItemStack aFacadeStack) {
-		Item item = aFacadeStack.getItem();
+		if(aFacadeStack == null) return 0;
+		final Item item = aFacadeStack.getItem();
 		if (!(item instanceof IFacadeItem)) return 0;
 		return ((IFacadeItem) item).getMeta(aFacadeStack);
 	}
diff --git a/src/main/java/gregtech/common/covers/GT_Cover_FacadeBase.java b/src/main/java/gregtech/common/covers/GT_Cover_FacadeBase.java
index fa3c6624f8..17aafef79e 100644
--- a/src/main/java/gregtech/common/covers/GT_Cover_FacadeBase.java
+++ b/src/main/java/gregtech/common/covers/GT_Cover_FacadeBase.java
@@ -94,8 +94,7 @@ public abstract class GT_Cover_FacadeBase extends GT_CoverBehaviorBase<GT_Cover_
 
     @Override
     public void placeCover(byte aSide, ItemStack aCover, ICoverable aTileEntity) {
-        aTileEntity.setCoverIDAtSide(aSide, GT_Utility.stackToInt(aCover));
-        aTileEntity.setCoverDataAtSide(aSide, new FacadeData(GT_Utility.copyAmount(1, aCover), 0));
+        aTileEntity.setCoverIdAndDataAtSide(aSide, GT_Utility.stackToInt(aCover), new FacadeData(GT_Utility.copyAmount(1, aCover), 0));
         if (aTileEntity.isClientSide())
             GT_RenderingWorld.getInstance().register(aTileEntity.getXCoord(), aTileEntity.getYCoord(), aTileEntity.getZCoord(), getTargetBlock(aCover), getTargetMeta(aCover));
     }
@@ -111,7 +110,8 @@ public abstract class GT_Cover_FacadeBase extends GT_CoverBehaviorBase<GT_Cover_
         Block block = getTargetBlock(aCoverVariable.mStack);
         if (block == null) return Textures.BlockIcons.ERROR_RENDERING[0];
         // TODO: change this when *someone* made the block render in both pass
-        if (block.getRenderBlockPass() != 0) return Textures.BlockIcons.ERROR_RENDERING[0];
+        if (block.getRenderBlockPass() != 0)
+            return Textures.BlockIcons.ERROR_RENDERING[0];
         return TextureFactory.builder().setFromBlock(block, getTargetMeta(aCoverVariable.mStack)).useWorldCoord().setFromSide(ForgeDirection.getOrientation(aSide)).build();
     }
 
@@ -207,7 +207,7 @@ public abstract class GT_Cover_FacadeBase extends GT_CoverBehaviorBase<GT_Cover_
         @Override
         public NBTBase saveDataToNBT() {
             NBTTagCompound tag = new NBTTagCompound();
-            tag.setTag("mStack", mStack.writeToNBT(new NBTTagCompound()));
+            if(mStack != null) tag.setTag("mStack", mStack.writeToNBT(new NBTTagCompound()));
             tag.setByte("mFlags", (byte) mFlags);
             return tag;
         }
diff --git a/src/main/java/gregtech/common/covers/GT_Cover_Fluidfilter.java b/src/main/java/gregtech/common/covers/GT_Cover_Fluidfilter.java
index 9492c8533d..457f27ae20 100644
--- a/src/main/java/gregtech/common/covers/GT_Cover_Fluidfilter.java
+++ b/src/main/java/gregtech/common/covers/GT_Cover_Fluidfilter.java
@@ -60,7 +60,7 @@ public class GT_Cover_Fluidfilter extends GT_CoverBehaviorBase<GT_Cover_Fluidfil
         if (fluid == null) return E;
 
         final FluidStack sFluid = new FluidStack(fluid, 1000);
-        return (String.format("Filtering Fluid: %s  Mode: %s", sFluid.getLocalizedName(), getFilterMode(aCoverVariable.mFilterMode)));
+        return (String.format("Filtering Fluid: %s - %s", sFluid.getLocalizedName(), getFilterMode(aCoverVariable.mFilterMode)));
     }
 
     @Override