Scoreboard Help?

So I'm making a plugin that uses scoreboards to track scores and something is not going right...
Basically, I asked a friend how to fix something as Eclipse didn't show errors but when I loaded my server it gave me an error saying nullpointerexception and he told me to add something that checks if the manager is null but now everything using board & manager elsewhere is saying it cannot be resolved and I cannot fix it. Any help will be appreciated!

CODE:

Code:

package me.rf2minecraft.ABBAMining;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Score;
import org.bukkit.scoreboard.Scoreboard;
import org.bukkit.scoreboard.ScoreboardManager;
import org.bukkit.scoreboard.Team;
 
public final class ABBAMining extends JavaPlugin {
    public void onEnable() {
        Bukkit.getServer().getPluginManager().registerEvents(new BlockBreak(), this);
    }
   
    ScoreboardManager manager = Bukkit.getScoreboardManager();
    if(manager!=null) {
        Scoreboard board = manager.getNewScoreboard();
        Team team = board.registerNewTeam("Scores");
        Team getTeam = board.getTeam("Scores");
        Objective objective = board.registerNewObjective("score", "dummy");
    } else {
        getLogger().info("ScoreboardManager could not be found!");
    }
   
    Score emeralds = objective.getScore(Bukkit.getOfflinePlayer(ChatColor.DARK_PURPLE + "Emeralds"));
    Score diamonds = objective.getScore(Bukkit.getOfflinePlayer(ChatColor.DARK_PURPLE + "Diamonds"));
    Score gold = objective.getScore(Bukkit.getOfflinePlayer(ChatColor.DARK_PURPLE + "Gold"));
    Score lapis = objective.getScore(Bukkit.getOfflinePlayer(ChatColor.DARK_PURPLE + "Lapis"));
    Score redstone = objective.getScore(Bukkit.getOfflinePlayer(ChatColor.DARK_PURPLE + "Redstone"));       
       
    public class BlockBreak implements Listener {
        @EventHandler
        public void onBlockBreak(BlockBreakEvent e) {
            if(!(e.getPlayer().getItemInHand().getType() == Material.DIAMOND_PICKAXE && e.getPlayer().getItemInHand().containsEnchantment(Enchantment.SILK_TOUCH))) return;
            if(!(e.getBlock().getType() == Material.EMERALD_ORE || e.getBlock().getType() == Material.DIAMOND_ORE)) return;
            if(!(e.getBlock().getType() == Material.GOLD_ORE || e.getBlock().getType() == Material.LAPIS_ORE || e.getBlock().getType() == Material.REDSTONE_ORE)) return;
            int EmeraldMined = 7;
            int DiamondMined = 5;
            int GoldMined = 3;
            int LapisMined = 1;
            int RedstoneMined = 1;
            objective.setDisplaySlot(DisplaySlot.SIDEBAR);
            objective.setDisplayName("Scores");
            if(e.getBlock().getType() == Material.EMERALD_ORE) {
                Player p = e.getPlayer();
                p.setScoreboard(board);
                emeralds.setScore(EmeraldMined);
            }
            if(e.getBlock().getType() == Material.DIAMOND_ORE) {
                Player p = e.getPlayer();
                p.setScoreboard(board);
                diamonds.setScore(DiamondMined);
            }
            if(e.getBlock().getType() == Material.GOLD_ORE) {
                Player p = e.getPlayer();
                p.setScoreboard(board);
                gold.setScore(GoldMined);
            }
            if(e.getBlock().getType() == Material.LAPIS_ORE) {
                Player p = e.getPlayer();
                p.setScoreboard(board);
                lapis.setScore(LapisMined);
            }
            if(e.getBlock().getType() == Material.REDSTONE_ORE) {
                Player p = e.getPlayer();
                p.setScoreboard(board);
                redstone.setScore(RedstoneMined);
                }
            }
        }
    }
}

 

Code:

if(manager!=null) {
        Scoreboard board = manager.getNewScoreboard();
        Team team = board.registerNewTeam("Scores");
        Team getTeam = board.getTeam("Scores");
        Objective objective = board.registerNewObjective("score", "dummy");
    } else {
        getLogger().info("ScoreboardManager could not be found!");
    }

that should be inside a method

 

So like...
public class ManagerNullCheck {
// CODE
} ?

 

method is not the same as a class

 

Erm.... can I have an example please? Sorry, I'm not used to fixing weird bugs like this.... atleast for me.

 

Well. I don't want to step on your toe but since this is more than basics of the basics of MOST programming language I personally advice you to go ahaed and learn java first. However here is a basic overview of a class and its method

Code:java

public class MyClass {
    // Here is your class body
    // Here you only should define
    // fields and methods and
    // if you like so another class
    public void myMethod(/*****/) {
        // here is where you do if clauses
        // and whatever else you want to do
    }
}

 

Ah thanks. I'll try later as I'm taking some time to myself for a bit.