update

Could not load 'plugins\VorzeigePlugin.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NullPointerException
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.loadPlugins(CraftServer.java:296) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.reload(CraftServer.java:743) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.Bukkit.reload(Bukkit.java:539) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchCommand(CraftServer.java:645) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchServerCommand(CraftServer.java:631) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at net.minecraft.server.v1_9_R1.DedicatedServer.aL(DedicatedServer.java:438) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:401) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:660) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:559) [spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_141]
Caused by: java.lang.NullPointerException
        at at.tamobida.main.main.<init>(main.java:13) ~[?:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_141]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_141]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_141]
        at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_141]
        at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_141]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:76) ~[spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[spigot-1.9.jar:git-Spigot-2038f4a-cd36f6f]
        ... 14 more