Bukkit/eclipse Error "Error occurred while enabling Command v1.8 (Is it up to date?)"

I dont know what i should do im new into java.

Code:

[15:12:21 ERROR]: Error occurred while enabling Command v1.8 (Is it up to date?)
java.lang.NullPointerException: Cannot invoke "org.bukkit.command.PluginCommand.setExecutor(org.bukkit.command.CommandExecutor)" because the return value of "com.Vitacraft.Command.Main.getCommand(String)" is null
        at com.Vitacraft.Command.Main.onEnable(Main.java:19) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[patched_1.8.8.jar:git-PaperSpigot-445]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332) [patched_1.8.8.jar:git-PaperSpigot-445]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:407) [patched_1.8.8.jar:git-PaperSpigot-445]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:359) [patched_1.8.8.jar:git-PaperSpigot-445]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:318) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:408) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:372) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:327) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:267) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:563) [patched_1.8.8.jar:git-PaperSpigot-445]
        at java.lang.Thread.run(Thread.java:833) [?:?]

I just wanted to code some random things and hat an error and dont know how to solve it.


Main:

Code:

package com.Vitacraft.Command;

import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.plugin.java.JavaPlugin;

import net.md_5.bungee.api.ChatColor;

public class Main extends JavaPlugin implements Listener {
   
    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
        getServer().getConsoleSender().sendMessage(ChatColor.GREEN + "WelcomePlugin Started");
        getCommand("hello").setExecutor(new CommandHello());
        getCommand("foodHelp").setExecutor(new FoodHelpCommand());
       
    }
   
    @Override
    public void onDisable() {
       
    }
   
    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent e) {
        Player p = e.getPlayer();
        if(p.hasPlayedBefore()) {
            e.setJoinMessage(ChatColor.MAGIC + p.getName() + ChatColor.DARK_GREEN + "Joined" );
    }
                               
        e.setJoinMessage( ChatColor.RED + "Hello " + ChatColor.AQUA + p.getName() + ChatColor.RED + " Welcome to Vitacraft!");
    }
   
    @EventHandler
    public void onPlayerQuit(PlayerQuitEvent e) {
        Player p = e.getPlayer();
        e.setQuitMessage(p.getName() + ChatColor.DARK_BLUE  + "has left the Sever :(");   
    }
   
}

plugin.yml

Code:

name: Command
main: com.Vitacraft.Command.Main
version: 1.8
author: Olle_Palle
commands:
   hello:
      description: basic command that reurns "hello" to the player who sends it
      usage: /hello
extracommand:
   food:
      description: food
      usage: /foodHelp

something other

Code:

package com.Vitacraft.Command;

import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;


public class CommandHello implements CommandExecutor {

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if(sender instanceof Player) {
        Player player = (Player) sender;
        player.sendMessage(ChatColor.YELLOW + "Hey i wish you a good Day!");
        }
        return false;
    }

}

something other 2

Code:

package com.Vitacraft.Command;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;


public class FoodHelpCommand implements CommandExecutor {

    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
               
        if(sender instanceof Player) {
            Player player = (Player) sender;
            player.sendMessage(ChatColor.YELLOW + "!");
           
            Inventory foodHelp = Bukkit.createInventory(player, 9, "Your FoodHelp");
                   
            ItemStack item1 = new ItemStack(Material.COOKED_BEEF, 64);
           
            foodHelp.setItem(3 , item1);
           
            player.openInventory(foodHelp);
           
       
        }else {
            System.out.println(ChatColor.RED + "Du musst ein Spieler sein um diesen Command durchführen zu können.");
        }
           
           
           
           
           
           
       
        return false;
    }

}