[10:36:43] [Server thread/ERROR]: Error occurred while enabling DoubleJump v1.2 (Is it up to date?)

java.lang.NullPointerException
	at main.DoubleJumpEvents.<init>(DoubleJumpEvents.java:42) ~[?:?]
	at main.DoubleJump.onEnable(DoubleJump.java:41) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:250) ~[Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:350) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:389) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugin(CraftServer.java:439) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.enablePlugins(CraftServer.java:375) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.m(MinecraftServer.java:342) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.g(MinecraftServer.java:319) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.a(MinecraftServer.java:275) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:175) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [Craftbukkit_1.7.4_R0.3(Build_-_3020).jar:git-Bukkit-1.7.2-R0.3-b3020jnks]