Make fields final if possible to ensure immutability

src/main/java/appeng/me/cache/helpers/TickTracker.java

@@ -16,7 +16,7 @@ public class TickTracker implements Comparable<TickTracker>
 	public final IGridNode node;
 	public final TickManagerCache host;
 
-	public long LastFiveTicksTime = 0;
+	public final long LastFiveTicksTime = 0;
 
 	public long lastTick;
 	public int current_rate;

src/main/java/appeng/me/cache/helpers/TunnelIterator.java

@@ -8,8 +8,8 @@ import appeng.parts.p2p.PartP2PTunnel;
 public class TunnelIterator<T extends PartP2PTunnel> implements Iterator<T>
 {
 
-	Iterator<T> wrapped;
-	Class targetType;
+	final Iterator<T> wrapped;
+	final Class targetType;
 	T Next;
 
 	private void findNext()