Add a statement inside PsiClass

Hi,  

Im working on a simple plugin which create couple of files and insert few methods. I also need to add a new variable to an existing file and insert one line statement.

public static final int var = 0;

i can add a variable/field like below

PsiField fd = elementFactory.createField("var", PsiType.INT);
psiClass1.add(fd);

But i am not able to make the variable public static final.

is there any other way to achieve the same?