Bukkit

Does this support spigot? get these errors.... not sure using spigot build 1239 would be nice if you could update this to allow spigot if thats the case kinda new to your plugin
[08:59:24] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'npc' in plugin NPCWarehouse v1.1
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-1237]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:196) ~[spigot.jar:git-Spigot-1237]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:546) ~[spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.PlayerConnection.handleCommand(PlayerConnection.java:962) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:817) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:147) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:679) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:273) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:540) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:446) [spigot.jar:git-Spigot-1237]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Spigot-1237]
Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
    at java.util.ArrayList.rangeCheck(Unknown Source) ~[?:1.7.0_45]
    at java.util.ArrayList.get(Unknown Source) ~[?:1.7.0_45]
    at net.npcwarehouse.NPCCommandHandler.createNPC(NPCCommandHandler.java:608) ~[?:?]
    at net.npcwarehouse.NPCCommandHandler.runCommand(NPCCommandHandler.java:106) ~[?:?]
    at net.npcwarehouse.util.CommandHandler.onCommand(CommandHandler.java:19) ~[?:?]
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-1237]
    ... 13 more