Make fields final if possible to ensure immutability

src/main/java/appeng/items/AEBaseItem.java

@@ -11,8 +11,8 @@ import appeng.core.features.IAEFeature;
 public class AEBaseItem extends Item implements IAEFeature
 {
 
-	String featureFullName;
-	String featureSubName;
+	final String featureFullName;
+	final String featureSubName;
 	AEFeatureHandler feature;
 
 	@Override

src/main/java/appeng/items/contents/PortableCellViewer.java

@@ -23,8 +23,8 @@ import appeng.util.Platform;
 public class PortableCellViewer extends MEMonitorHandler<IAEItemStack> implements IPortableCell
 {
 
-	private ItemStack target;
-	private IAEItemPowerStorage ips;
+	private final ItemStack target;
+	private final IAEItemPowerStorage ips;
 
 	public PortableCellViewer(ItemStack is) {
 		super( CellInventory.getCell( is, null ) );

src/main/java/appeng/items/materials/ItemMultiMaterial.java

@@ -49,7 +49,7 @@ import com.google.common.collect.ImmutableSet;
 public class ItemMultiMaterial extends AEBaseItem implements IStorageComponent, IUpgradeModule
 {
 
-	HashMap<Integer, MaterialType> dmgToMaterial = new HashMap<Integer, MaterialType>();
+	final HashMap<Integer, MaterialType> dmgToMaterial = new HashMap<Integer, MaterialType>();
 
 	public static ItemMultiMaterial instance;
 
@@ -63,7 +63,7 @@ public class ItemMultiMaterial extends AEBaseItem implements IStorageComponent,
 	class SlightlyBetterSort implements Comparator<String>
 	{
 
-		Pattern p;
+		final Pattern p;
 
 		public SlightlyBetterSort(Pattern p) {
 			this.p = p;

src/main/java/appeng/items/materials/MaterialType.java

@@ -66,7 +66,7 @@ public enum MaterialType
 	BlankPattern(52), CardCrafting(53);
 
 	private String oreName;
-	private EnumSet<AEFeature> features;
+	private final EnumSet<AEFeature> features;
 	private Class<? extends Entity> droppedEntity;
 
 	// IIcon for the material.

src/main/java/appeng/items/misc/ItemCrystalSeed.java

@@ -39,9 +39,9 @@ public class ItemCrystalSeed extends AEBaseItem implements IGrowableCrystal
 	public static final int Fluix = SINGLE_OFFSET * 2;
 	public static final int END = SINGLE_OFFSET * 3;
 
-	IIcon certus[] = new IIcon[3];
-	IIcon fluix[] = new IIcon[3];
-	IIcon nether[] = new IIcon[3];
+	final IIcon[] certus = new IIcon[3];
+	final IIcon[] fluix = new IIcon[3];
+	final IIcon[] nether = new IIcon[3];
 
 	private int getProgress(ItemStack is)
 	{

src/main/java/appeng/items/misc/ItemEncodedPattern.java

@@ -114,7 +114,7 @@ public class ItemEncodedPattern extends AEBaseItem implements ICraftingPatternIt
 	}
 
 	// rather simple client side caching.
-	static WeakHashMap<ItemStack, ItemStack> simpleCache = new WeakHashMap<ItemStack, ItemStack>();
+	static final WeakHashMap<ItemStack, ItemStack> simpleCache = new WeakHashMap<ItemStack, ItemStack>();
 
 	public ItemStack getOutput(ItemStack item)
 	{

src/main/java/appeng/items/parts/ItemMultiPart.java

@@ -43,7 +43,7 @@ public class ItemMultiPart extends AEBaseItem implements IPartItem, IItemGroup
 		IIcon ico;
 	}
 
-	HashMap<Integer, PartTypeIst> dmgToPart = new HashMap<Integer, PartTypeIst>();
+	final HashMap<Integer, PartTypeIst> dmgToPart = new HashMap<Integer, PartTypeIst>();
 
 	public static ItemMultiPart instance;