Cannot locate my error..

Error.

Code (Text):

c133e]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_121]
[23:45:15 WARN]: [Empires] Task #9 for Empires v1.0 generated an exception
java.lang.NullPointerException
        at net.prickledpvp.empires.PlayerObject.setClan(PlayerObject.java:42) ~[?:?]
        at net.prickledpvp.empires.Update.update(Update.java:15) ~[?:?]
        at net.prickledpvp.empires.Main$1.run(Main.java:37) ~[?:?]
        at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:353) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:738) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_121]
[23:45:16 WARN]: [Empires] Task #9 for Empires v1.0 generated an exception
java.lang.NullPointerException
        at net.prickledpvp.empires.PlayerObject.setClan(PlayerObject.java:42) ~[?:?]
        at net.prickledpvp.empires.Update.update(Update.java:15) ~[?:?]
        at net.prickledpvp.empires.Main$1.run(Main.java:37) ~[?:?]
        at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:353) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:738) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_121]
[23:45:17 WARN]: [Empires] Task #9 for Empires v1.0 generated an exception
java.lang.NullPointerException
        at net.prickledpvp.empires.PlayerObject.setClan(PlayerObject.java:42) ~[?:?]
        at net.prickledpvp.empires.Update.update(Update.java:15) ~[?:?]
        at net.prickledpvp.empires.Main$1.run(Main.java:37) ~[?:?]
        at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:353) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:738) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot.jar:git-Spigot-54ec0b8-1ac133e]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_121]

ClanManager

Code (Text):

public static void clanSetup()
    {

        /* If this pathname does not denote a directory, then listFiles() returns null. */
        File[] files = new File("plugins/Empires/ClanObjects").listFiles();

        for (File f : files) {
           if (f.isFile()) {
              String tId = f.getName().substring(0, f.getName().length() - 4);
                if (!Clans.containsKey(tId)){
                    Clans.put(tId, new ClanObject(tId));  
                }        
           }
        }
    }

ClanObject

Code (Text):

    /* INIT */
    public ClanObject(String clanId) {  
        Id = clanId;
        file = new File("plugins/Empires/ClanObjects", Id + ".yml");
        config = YamlConfiguration.loadConfiguration(file);
    }

PlayerObject

Code (Text):

    /* CLAN */
    public void setClan(String arg)
    {
        String id = "";
       
        for(Entry<String, ClanObject> entry : ClanManager.Clans.entrySet()) {
            ClanObject clanObject = entry.getValue();
            if (clanObject.getName().equals(arg))
                id = clanObject.Id;
        }
        System.out.println(arg);
        System.out.println(id);
        config.set("Clan.Name", arg);
        config.set("Clan.Id", id);
        saveObject();
    }