How to set breakpoints with line and filepath

I am developing a plugin.

I have the filename and a line number which I want to use to set a breakpoint in the program corresponding to that file (like I can do it as a use by clicking on the left side of the line in the editor). For now it can be specific to Java programs.

I tried the following, but it doesn't seem to have any effect (though also no error or exceptions as far as I can see):

static void addBreakpoints(@NotNull Project project){
    Runnable r = ()-> {

        var breakPointManager = XDebuggerManager.getInstance(project).getBreakpointManager();

        XLineBreakpointType<?> lineBreakPointType = null;
        for (var type : XDebuggerUtil.getInstance().getLineBreakpointTypes()) {
            if (type.getId().equals("java-line")) {
                lineBreakPointType = type;
            }
        }
        if (lineBreakPointType == null)
            return;

        breakPointManager.addLineBreakpoint(
                lineBreakPointType,
                "/home/user/IdeaProjects/untitled1/src/Main.java",
                14,
                null,
                true
        );
    };

    WriteCommandAction.runWriteCommandAction(project, r);
}

What am I missing?