protected void OnButtonAddClicked(object sender, EventArgs e)
{
var employeeJournal = _employeeFactory.CreateEmployeesJournal();
employeeJournal.SelectionMode = JournalSelectionMode.Single;
employeeJournal.OnEntitySelectedResult += OnEmployeeSelectedFromJournal;
MyTab.TabParent.AddSlaveTab(MyTab, employeeJournal);
}