comentar cada linea de codigo netbeans

[evilteam]

Kiero ayuda con este codigo
es decir kisiera qe me ayuden a COMENTAR cada linea de este codigo para qe sirve
o sea comentar CADA LINEA para qe sirve...
si me ayudan en eso seria estupendo...tengo 8 clases:D luego poco a poco subire las otras :P
2da clase

public class BasePlusCommissionEmployee extends CommissionEmployee {
private double baseSalary;
public BasePlusCommissionEmployee (String first, String last, String ssn, double sales, double rate, double salary){
super (first, last, ssn, rate, sales);
setBaseSalary (salary);
}
public void setBaseSalary (double salary){
if (salary >= 0.0)
baseSalary = salary;
else
throw new IllegalArgumentException("Base salary must be >= 0.0");
}
public double getBaseSalary(){
return baseSalary;
}
@Override
public double earnings(){
return getBaseSalary() + super.earnings();
}
@Override
public String toString(){
return String.format("%s %s\n%s: %.2f", "base-salaried",
super.toString(), "base salary", getBaseSalary());
}
}