diff --git a/conntrackt/forms.py b/conntrackt/forms.py
--- a/conntrackt/forms.py
+++ b/conntrackt/forms.py
@@ -1,12 +1,72 @@
 # Django imports.
 from django.forms import ModelForm
-from django.forms.models import inlineformset_factory
 
 # Application imports.
 from .models import Entity, Interface, Communication
 
 
-class EntityForm(ModelForm):
+class WidgetCSSClassFormMixin(object):
+    """
+    Helper form mixin that can be used for applying additional custom CSS
+    classes to form field widgets.
+
+    The mixin accepts the following class options:
+
+        widget_css_classes - Dictionary describing which additional CSS classes
+        should be applied to which form widget. Dictinoary keys should be equal
+        to form widget names, while the value should be a string containing the
+        extra CSS classes that should be applied to it. In order to apply the
+        CSS classes to every widget of the form, use the key "ALL"
+    """
+
+    def __init__(self, *args, **kwargs):
+        """
+        Assigns the custom CSS classes form widgets, as configured by the
+        widget_css_classes property.
+        """
+
+        super(WidgetCSSClassFormMixin, self).__init__(*args, **kwargs)
+
+        for field_name, css_class in self.widget_css_classes.iteritems():
+            if field_name == "ALL":
+                for field in self.fields.values():
+                    if "class" in field.widget.attrs:
+                        field.widget.attrs["class"] += " " + css_class
+                    else:
+                        field.widget.attrs["class"] = css_class
+            else:
+                field = self.fields[field_name]
+                if "class" in field.widget.attrs:
+                    field.widget.attrs["class"] += " " + css_class
+                else:
+                    field.widget.attrs["class"] = css_class
+
+
+class PlaceholderFormMixin(object):
+    """
+    Helper form mixin that can be used to set-up placeholders for text widgets.
+
+    The mixin accepts the following class options:
+
+        widget_placeholders - Dictionary describing which placeholders should be
+        applied to which widgets. Keys should be equal to form widget names,
+        while the values should be the strings that should be set as
+        placeholders.
+    """
+
+    def __init__(self, *args, **kwargs):
+        """
+        Assigns the placeholders to text form widgets, as configured by the
+        widget_placeholders property.
+        """
+
+        super(PlaceholderFormMixin, self).__init__(*args, **kwargs)
+
+        for field_name, placeholder in self.widget_placeholders.iteritems():
+            self.fields[field_name].widget.attrs["placeholder"] = placeholder
+
+
+class EntityForm(WidgetCSSClassFormMixin, PlaceholderFormMixin, ModelForm):
     """
     Implements a custom model form for entities with some styling changes.
     """
@@ -14,24 +74,12 @@ class EntityForm(ModelForm):
     class Meta:
         model = Entity
 
-    def __init__(self, *args, **kwargs):
-        """
-        Initialises the form instance. Sets-up some bootstrap CSS classes for
-        widgets.
-        """
-
-        super(EntityForm, self).__init__(*args, **kwargs)
-
-        # Update the widgets to be wider.
-        for field_name, field in self.fields.iteritems():
-            field.widget.attrs["class"] = "span6"
-
-        # Set-up some placeholders.
-        self.fields["name"].widget.attrs["placeholder"] = "Entity name"
-        self.fields["description"].widget.attrs["placeholder"] = "Entity description"
+    widget_placeholders = {"name": "Entity name",
+                           "description": "Entity description"}
+    widget_css_classes = {"ALL": "span6"}
 
 
-class InterfaceForm(ModelForm):
+class InterfaceForm(WidgetCSSClassFormMixin, PlaceholderFormMixin, ModelForm):
     """
     Implements a custom model form for interfaces with some styling changes.
     """
@@ -39,26 +87,15 @@ class InterfaceForm(ModelForm):
     class Meta:
         model = Interface
 
-    def __init__(self, *args, **kwargs):
-        """
-        Initialises the form instance. Sets-up some bootstrap CSS classes for
-        widgets.
-        """
-
-        super(InterfaceForm, self).__init__(*args, **kwargs)
+    widget_placeholders = {"name": "Interface name",
+                           "description": "Interface description",
+                           "address": "IP address of interface",
+                           "netmask": "IP address netmask"}
 
-        # Update the widgets to be wider.
-        for field_name, field in self.fields.iteritems():
-            field.widget.attrs["class"] = "span6"
-
-        # Set-up some placeholders.
-        self.fields["name"].widget.attrs["placeholder"] = "Interface name"
-        self.fields["description"].widget.attrs["placeholder"] = "Interface description"
-        self.fields["address"].widget.attrs["placeholder"] = "IP address of interface"
-        self.fields["netmask"].widget.attrs["placeholder"] = "IP address netmask"
+    widget_css_classes = {"ALL": "span6"}
 
 
-class CommunicationForm(ModelForm):
+class CommunicationForm(WidgetCSSClassFormMixin, PlaceholderFormMixin, ModelForm):
     """
     Implements a custom model form for communications with some styling changes.
     """
@@ -66,18 +103,7 @@ class CommunicationForm(ModelForm):
     class Meta:
         model = Communication
 
-    def __init__(self, *args, **kwargs):
-        """
-        Initialises the form instance. Sets-up some bootstrap CSS classes for
-        widgets.
-        """
-
-        super(CommunicationForm, self).__init__(*args, **kwargs)
+    widget_placeholders = {"port": "Port used for communication",
+                           "description": "Communication description"}
 
-        # Update the widgets to be wider.
-        for field_name, field in self.fields.iteritems():
-            field.widget.attrs["class"] = "span6"
-
-        # Set-up some placeholders.
-        self.fields["port"].widget.attrs["placeholder"] = "Port used for communication"
-        self.fields["description"].widget.attrs["placeholder"] = "Communication description"
+    widget_css_classes = {"ALL": "span6"}