fix(textfiles): add missing neline at end of files

git and diff tools will complain if text file does not end with a newline.

Fixed all text files in the repository with Linux bash shell:

```sh
git ls-files -z |
while IFS= read -rd '' f; do
  mime="$(file --brief --mime "$f")";
  if [ -z "${mime##text/*}" ]; then
    tail -c1 "$f" |
      read -r _ || printf '\n' >>"$f";
  fi;
done
```

2 files changed, 2 insertions, 2 deletions

diff --git a/src/main/java/gregtech/api/interfaces/metatileentity/IMachineCallback.java b/src/main/java/gregtech/api/interfaces/metatileentity/IMachineCallback.java
index 9306ef28f3..f67fb0f600 100644
--- a/src/main/java/gregtech/api/interfaces/metatileentity/IMachineCallback.java
+++ b/src/main/java/gregtech/api/interfaces/metatileentity/IMachineCallback.java
@@ -4,4 +4,4 @@ public interface IMachineCallback<Machinetype extends IMetaTileEntity> {
     Machinetype getCallbackBase();
     void setCallbackBase(Machinetype callback);
     Class<Machinetype> getType();
-}
\ No newline at end of file
+}
diff --git a/src/main/java/gregtech/api/interfaces/metatileentity/IMetaTileEntityCable.java b/src/main/java/gregtech/api/interfaces/metatileentity/IMetaTileEntityCable.java
index a7c1209d24..85237ac4f4 100644
--- a/src/main/java/gregtech/api/interfaces/metatileentity/IMetaTileEntityCable.java
+++ b/src/main/java/gregtech/api/interfaces/metatileentity/IMetaTileEntityCable.java
@@ -12,4 +12,4 @@ public interface IMetaTileEntityCable extends IMetaTileEntity {
     default long transferElectricity(byte aSide, long aVoltage, long aAmperage, HashSet<TileEntity> aAlreadyPassedSet) {
         return transferElectricity(aSide, aVoltage, aAmperage, new ArrayList<>(aAlreadyPassedSet));
     }
-}
\ No newline at end of file
+}