Tidied up file opening method.

gprMax/geometry_outputs.py

@@ -410,7 +410,7 @@ class GeometryObjects:
         """
 
         # Write the geometry objects to a HDF5 file
-        fdata = h5py.File(self.filename_hdf5, 'w')
+        with h5py.File(self.filename_hdf5, 'w') as fdata:
             fdata.attrs['gprMax'] = __version__
             fdata.attrs['Title'] = G.title
             fdata.attrs['dx_dy_dz'] = (G.dx, G.dy, G.dz)
@@ -434,7 +434,7 @@ class GeometryObjects:
 
         # Write materials list to a text file
         # This includes all materials in range whether used in volume or not
-        fmaterials = open(self.filename_materials, 'w')
+        with open(self.filename_materials, 'w') as fmaterials:
             for numID in range(minmat, maxmat + 1):
                 for material in G.materials:
                     if material.numID == numID: