api: mark runtime classes as final

runelite-api/src/main/java/net/runelite/api/GraphicID.java

@@ -24,7 +24,7 @@
  */
 package net.runelite.api;
 
-public class GraphicID
+public final class GraphicID
 {
 	public static final int WINE_MAKE = 47;
 	public static final int SPLASH = 85;

runelite-api/src/main/java/net/runelite/api/ParamID.java

@@ -27,7 +27,7 @@ package net.runelite.api;
 /**
  * @see ParamHolder
  */
-public class ParamID
+public final class ParamID
 {
 	/**
 	 * @see SettingID

runelite-api/src/main/java/net/runelite/api/ProjectileID.java

@@ -29,7 +29,7 @@ package net.runelite.api;
  * <p>
  * Note: This class is not complete and may be missing mapped IDs.
  */
-public class ProjectileID
+public final class ProjectileID
 {
 	public static final int CANNONBALL = 53;
 	public static final int GRANITE_CANNONBALL = 1443;

runelite-api/src/main/java/net/runelite/api/SettingID.java

@@ -27,7 +27,7 @@ package net.runelite.api;
 /**
  * @see ParamID#SETTING_ID
  */
-public class SettingID
+public final class SettingID
 {
 	public static final int CAMERA_ZOOM = 14;
 

runelite-api/src/main/java/net/runelite/api/StructID.java

@@ -29,7 +29,7 @@ package net.runelite.api;
  * @see StructComposition
  * @see Client#getStructComposition(int)
  */
-public class StructID
+public final class StructID
 {
 	public static final int SETTINGS_MUSIC_VOLUME = 2753;
 	public static final int SETTINGS_EFFECT_VOLUME = 2754;