Java Programming

I want to make an array of objects, storing variables by referering to array index.
This is what I've written of code so far. Running this will create a NullPointerException

public class Company {
	
	private String owner;
	private double income;
	
	public Company(String company)
	{
		//Unsure whether i need constructor?
	}
	public void setOwner(String company)
	{
		owner = company;	//Set the value for owner in given arrray object
	}
	
	public void setIncome(double income)
	{
		this.income += income;
	}
	
	public String returnOwner()
	{
		return owner;
	}
	
}

public class Marked {
	
	public static void main(String args[]){
	Company[][] owner = new Company[15][20];
	
	owner[0][0].setOwner("CompanyName");
	System.out.println("Content of Comapny[" + 0 + "][" + 0 + "] is " + owner[0][0].returnOwner() + " !");
	
	}
}

Any suggestions on what to do next will be much appreciated!
If you're not sure what I'm trying to do, please tell and I will try to explain further.
Thanks for any help in advance