Scoreboard NPE

When I try to run methods from a class file I have, I get a NPE saying my scoreboard is null. Here is the class:

Code:

public class ISCOREAPI{
    Scoreboard board;
    Objective obj;
   
    public void createNewScoreboard(){
        board = Bukkit.getScoreboardManager().getNewScoreboard();
    }
   
    public void createObjective(String name, String desc){
        obj = board.registerNewObjective(name, desc);
        obj.setDisplayName(name);
        obj.setDisplaySlot(DisplaySlot.SIDEBAR);
    }
   
    public void removeObjective(String obj){
        board.getObjective(obj).unregister();
    }
   
    public void createTeam(String name){
        Team team = board.registerNewTeam(name);
        team.setDisplayName(name);
    }
   
    public void removeTeam(String team){
        board.getTeam(team).unregister();
    }
   
    public void addPlayerToTeam(String team, Player p){
        board.getTeam(team).addPlayer(p);
    }
   
    public int getScores(OfflinePlayer p){
        Score score = obj.getScore(p);
        return score.getScore();
    }
   
    public void setScore(OfflinePlayer p, int sc){
        Score score = obj.getScore(p);
        score.setScore(sc);
    }
   
    public void removePlayerFromTeam(String team, Player p){
        board.getTeam(team).removePlayer(p);
    }
   
    public void refreshPlayerScoreboard(Player p){
        p.setScoreboard(board);
    }
   
    public boolean teamExists(String teamName){
        if(board.getTeam(teamName) != null){
            return true;
        }else{
            return false;
        }
    }
}

And this is how I try to run methods. In the code I do this multiple times in different classes. How else can I do this so I don't get any errors?:

Code:

ISCOREAPI api = new ISCOREAPI();
 
public void someRandomMethodInADifferentClass(){
  api.runSomeMethod(params);
}

I want to be able to make multiple instances of my ISCOREAPI class and yet keep the variables from becoming null.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Replace

Code:java

public void createNewScoreboard(){
board = Bukkit.getScoreboardManager().getNewScoreboard();
}

with

Code:java

public ISCOREAPI() {
board = Bukkit.getScoreboarManager().getNewScoreboard();
}