Stack trace on startup

[ttk2]

2014-05-26 08:15:30 [INFO] [FactoryMod] Enabling FactoryMod v1.0
2014-05-26 08:15:32 [ERROR] Error occurred while enabling FactoryMod v1.0 (Is it up to date?)
java.lang.NullPointerException
at com.github.igotyou.FactoryMod.managers.ProductionManager.save(ProductionManager.java:90) ~[?:?]
at com.github.igotyou.FactoryMod.managers.FactoryModManager.load(FactoryModManager.java:158) ~[?:?]
at com.github.igotyou.FactoryMod.managers.FactoryModManager.loadManagers(FactoryModManager.java:117) ~[?:?]
at com.github.igotyou.FactoryMod.managers.FactoryModManager.(FactoryModManager.java:52) ~[?:?]
at com.github.igotyou.FactoryMod.FactoryModPlugin.onEnable(FactoryModPlugin.java:66) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:250) ~[spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:350) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:390) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugin(CraftServer.java:460) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at org.bukkit.craftbukkit.v1_7_R1.CraftServer.enablePlugins(CraftServer.java:380) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at net.minecraft.server.v1_7_R1.MinecraftServer.m(MinecraftServer.java:348) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at net.minecraft.server.v1_7_R1.MinecraftServer.g(MinecraftServer.java:325) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at net.minecraft.server.v1_7_R1.MinecraftServer.a(MinecraftServer.java:281) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:186) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:437) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]