null while Material.valueOf

Hi, I've got a problem with my plugin.
Here's a code:

Code (Text):

    public static ItemStack getBlazeFishingRodItemStack(){
        String it = Main.getConfiguration().getBlazeFishingRodItem();
        Material item = Material.matchMaterial(it);
        String name = Main.getConfiguration().getBlazeFishingRodName();
        List<String> lore = Main.getConfiguration().getBlazeFishingRodLore();
        ItemStack is = Utils.createItem(item, 1, name, lore);
        return is;
    }
 

problem is with getters: they are getting string while I am sending it (sendMessage) but there are nulls.

stacktrace:

Code (Text):

[14:42:11] [Server thread/ERROR]: Error occurred while enabling hs_Tools v1.0 (Is it up to date?)
java.lang.NullPointerException
    at me.hardstyl3r.tools.Main.getBlazeFishingRodItemStack(Main.java:206) ~[?:?]
    at me.hardstyl3r.tools.Main.onEnable(Main.java:44) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:292) ~[spigot.jar:git-Spigot-8a048fe-106ced0]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [spigot.jar:git-Spigot-8a048fe-106ced0]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-8a048fe-106ced0]
    at org.bukkit.craftbukkit.v1_9_R2.CraftServer.loadPlugin(CraftServer.java:362) [spigot.jar:git-Spigot-8a048fe-106ced0]
    at org.bukkit.craftbukkit.v1_9_R2.CraftServer.enablePlugins(CraftServer.java:322) [spigot.jar:git-Spigot-8a048fe-106ced0]
    at net.minecraft.server.v1_9_R2.MinecraftServer.t(MinecraftServer.java:416) [spigot.jar:git-Spigot-8a048fe-106ced0]
    at net.minecraft.server.v1_9_R2.MinecraftServer.l(MinecraftServer.java:381) [spigot.jar:git-Spigot-8a048fe-106ced0]
    at net.minecraft.server.v1_9_R2.MinecraftServer.a(MinecraftServer.java:336) [spigot.jar:git-Spigot-8a048fe-106ced0]
    at net.minecraft.server.v1_9_R2.DedicatedServer.init(DedicatedServer.java:268) [spigot.jar:git-Spigot-8a048fe-106ced0]
    at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:532) [spigot.jar:git-Spigot-8a048fe-106ced0]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
 

 

I said, all getters are working. Only here it's not.

 

Where? Should I check if string is null when it works?

 

getConfiguration and getBlazeFishingRodCrafting are working properly.

 

I don't understand you.

 

Code (Text):

    public static ItemStack getBlazeFishingRodItemStack(){
        String it = Main.getConfiguration().getBlazeFishingRodItem();
        Material item = Material.matchMaterial(it);
        String name = Main.getConfiguration().getBlazeFishingRodName();
        List<String> lore = Main.getConfiguration().getBlazeFishingRodLore();
        ItemStack is = Utils.createItem(item, 1, name, lore);
        return is;
    }

and the Utils.createItem:

Code (Text):

    public static ItemStack createItem(Material dc, int typeID, String name, List<String> description){
        ItemStack i = new ItemStack(dc, 1, (byte)typeID);
        ItemMeta im = i.getItemMeta();
        im.setDisplayName(ChatColor.translateAlternateColorCodes('&', name));
        ArrayList<String> lore = new ArrayList<>();
        for (String line : description) {
            lore.add(ChatColor.translateAlternateColorCodes('&', line));
        }
        im.setLore(lore);
        i.setItemMeta(im);
        return i;
    }

 

yes, configs are working, but only there they aren't.

it's 206 line in my Main.class.

Code (Text):

Material item = Material.matchMaterial(it);

 

Code (Text):

    public String getBlazeFishingRodItem(){
        return blazefishingroditem;
    }
 

and

Code (Text):

this.blazefishingroditem = this.file.getString("blazefishingrod.item");
 

file = config
it just returns "FISHING_ROD"

 

in Configuration.class:

Code (Text):

    public Configuration(FileConfiguration file) {
        this.file = file; (it's private FileConfiguration file;)
        this.loadConfiguration();
    }

and it's loaded by:

Code (Text):

    public void loadConfiguration() {
        this.saveDefaultConfig();
        configuration = new Configuration(this.getConfig());
    }