on server stop.

[22:13:48 INFO]: Stopping server
[22:13:48 INFO]: [Thirst] Disabling Thirst v1.0
[22:13:48 INFO]: [Thirst] Saving players to file
[22:13:48 ERROR]: null
java.io.IOException The system cannot find the path specified
        at java.io.WinNTFileSystem.createFileExclusively(Native Method) ~[?:1.8.
0_31]
        at java.io.File.createNewFile(Unknown Source) ~[?:1.8.0_31]
        at com.hmmcrunchy.thirst.ThirstData.saveToFile(ThirstData.java:50) [Thir
st-1.0.1-1.8.jar]
        at com.hmmcrunchy.thirst.Thirst.onDisable(Thirst.java:752) [Thirst-1.0.1
-1.8.jar:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:323) [sp
igot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoade
r.java:359) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManag
er.java:424 [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginMana
ger.java:417 [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.disablePlugins(CraftServer
.java:335) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.MinecraftServer.stop(MinecraftServer.jav
a:441) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:572) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
[22:13:48 ERROR]: Error occurred while disabling Thirst v1.0 (Is it up to date?)

java.lang.NullPointerException
        at com.hmmcrunchy.thirst.ThirstData.saveToFile(ThirstData.java:60) ~[?:?
]
        at com.hmmcrunchy.thirst.Thirst.onDisable(Thirst.java:752) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:323) ~[s
pigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoade
r.java:359) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManag
er.java:424 [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginMana
ger.java:417 [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.disablePlugins(CraftServer
.java:335) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.MinecraftServer.stop(MinecraftServer.jav
a:441) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:572) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]