Make fields final if possible to ensure immutability

src/main/java/appeng/core/sync/AppEngPacketHandlerBase.java

@@ -35,7 +35,7 @@ import appeng.core.sync.packets.PacketValueConfig;
 public class AppEngPacketHandlerBase
 {
 
-	public static Map<Class, PacketTypes> reverseLookup = new HashMap<Class, AppEngPacketHandlerBase.PacketTypes>();
+	public static final Map<Class, PacketTypes> reverseLookup = new HashMap<Class, AppEngPacketHandlerBase.PacketTypes>();
 
 	public enum PacketTypes
 	{

src/main/java/appeng/core/sync/GuiBridge.java

@@ -169,9 +169,9 @@ public enum GuiBridge implements IGuiHandler
 
 	GUI_CRAFTING_STATUS(ContainerCraftingStatus.class, ITerminalHost.class, ITEM_OR_WORLD, SecurityPermissions.CRAFT);
 
-	private Class Tile;
+	private final Class Tile;
 	private Class Gui;
-	private Class Container;
+	private final Class Container;
 	private GuiHostType type;
 	private SecurityPermissions requiredPermission;
 

src/main/java/appeng/core/sync/packets/PacketClick.java

@@ -18,8 +18,13 @@ import appeng.items.tools.powered.ToolColorApplicator;
 public class PacketClick extends AppEngPacket
 {
 
-	int x, y, z, side;
-	float hitX, hitY, hitZ;
+	final int x;
+	final int y;
+	final int z;
+	final int side;
+	final float hitX;
+	final float hitY;
+	final float hitZ;
 
 	// automatic.
 	public PacketClick(ByteBuf stream) throws IOException {

src/main/java/appeng/core/sync/packets/PacketPaintedEntity.java

@@ -15,8 +15,8 @@ import appeng.hooks.TickHandler.PlayerColor;
 public class PacketPaintedEntity extends AppEngPacket
 {
 
-	private AEColor myColor;
-	private int entityId;
+	private final AEColor myColor;
+	private final int entityId;
 	private int ticks;
 
 	// automatic.

src/main/java/appeng/core/sync/packets/PacketPartialItem.java

@@ -13,8 +13,8 @@ import appeng.core.sync.network.INetworkInfo;
 public class PacketPartialItem extends AppEngPacket
 {
 
-	short pageNum;
-	byte[] data;
+	final short pageNum;
+	final byte[] data;
 
 	// automatic.
 	public PacketPartialItem(ByteBuf stream) throws IOException {

src/main/java/appeng/core/sync/packets/PacketProgressBar.java

@@ -14,8 +14,8 @@ import appeng.core.sync.network.INetworkInfo;
 public class PacketProgressBar extends AppEngPacket
 {
 
-	short id;
-	long value;
+	final short id;
+	final long value;
 
 	// automatic.
 	public PacketProgressBar(ByteBuf stream) throws IOException {

src/main/java/appeng/core/sync/packets/PacketSwapSlots.java

@@ -13,7 +13,8 @@ import appeng.core.sync.network.INetworkInfo;
 public class PacketSwapSlots extends AppEngPacket
 {
 
-	int slotA, slotB;
+	final int slotA;
+	final int slotB;
 
 	// automatic.
 	public PacketSwapSlots(ByteBuf stream) throws IOException {