Improved exceptions

Many exceptions got an improvement due to changed class or description or details it is providing.
Is not complete, needs to be done in patches in the regions, where it is needed, since some are just
swallowed.

Removed total usage of pure RuntimeExceptions to 0.

src/main/java/appeng/util/prioitylist/IPartitionList.java

@@ -24,7 +24,6 @@ import appeng.api.storage.data.IAEStack;
 
 public interface IPartitionList<T extends IAEStack<T>>
 {
-
 	boolean isListed( T input );
 
 	boolean isEmpty();

src/main/java/appeng/util/prioitylist/MergedPriorityList.java

@@ -20,16 +20,16 @@ package appeng.util.prioitylist;
 
 
 import java.util.ArrayList;
-import java.util.List;
+import java.util.Collection;
 
 import appeng.api.storage.data.IAEStack;
 
 
-public class MergedPriorityList<T extends IAEStack<T>> implements IPartitionList<T>
+public final class MergedPriorityList<T extends IAEStack<T>> implements IPartitionList<T>
 {
 
-	final List<IPartitionList<T>> positive = new ArrayList<IPartitionList<T>>();
-	final List<IPartitionList<T>> negative = new ArrayList<IPartitionList<T>>();
+	private final Collection<IPartitionList<T>> positive = new ArrayList<IPartitionList<T>>();
+	private final Collection<IPartitionList<T>> negative = new ArrayList<IPartitionList<T>>();
 
 	public void addNewList( IPartitionList<T> list, boolean isWhitelist )
 	{
@@ -67,6 +67,6 @@ public class MergedPriorityList<T extends IAEStack<T>> implements IPartitionList
 	@Override
 	public Iterable<T> getItems()
 	{
-		throw new RuntimeException( "Not Implemented" );
+		throw new UnsupportedOperationException();
 	}
 }