How to wrap a function with a try finally block

I tried to write a tool to add a static method to every function and guarantee
it is called before the method return, i wrote something in the MethodAdaptor
like this:
   public void visitInsn(int opcode)
    {	  
      if ((opcode >= Opcodes.IRETURN && opcode <= Opcodes.RETURN) || opcode ==
Opcodes.ATHROW)  {
	  mv.visitMethodInsn(Opcodes.INVOKESTATIC, className, methodName,
"()V");
      }
      
      mv.visitInsn(opcode);
    }	

It does not work when the method calls some other method and that guy throws a
RuntimeException, then i tried to use try finally to wrap the whole method body
like this:
transfer
private void method1()
{
  code....
  ...
} 
to:
private void method1()
{
  try {
    code....
    ...
  } finally {
    StaticClass.method();
  }
}

I wrote a small class and checked the binary code with both javap and
ASMifierClassVisitor, then i realized that i have to figure out every posible
branche that may jump into the finally block and do something with the
exception table.

I have read the guild and have not got anything helpful. It's too hard or i
just can't do this?

Thanks for your patience.

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