start work on UseCaseBase Class

LDDsimulation/UseCaseBase.py

+"""base class for LDD simulation use cases.
+
+This module defines a base class for the LDDsimulation usecases.
+"""
+
+import dolfin as df
+import mshr
+import numpy as np
+import sympy as sym
+import typing as tp
+import functools as ft
+import domainPatch as dp
+import LDDsimulation as ldd
+import helpers as hlp
+
+class UseCaseBase(object):
+    """Base class for LDD simulation use cases.
+    """
+