Avoid calling delete_all on HABTM_ tables about database_plumber HOT 1 CLOSED

diff --git a/lib/database_plumber/leak_finder.rb b/lib/database_plumber/leak_finder.rb
index b6e230a..8f5ca1c 100644
--- a/lib/database_plumber/leak_finder.rb
+++ b/lib/database_plumber/leak_finder.rb
@@ -3,12 +3,12 @@ module DatabasePlumber
     IGNORED_AR_INTERNALS = [ActiveRecord::SchemaMigration]
     private_constant :IGNORED_AR_INTERNALS

-    def self.inspect(options={})
-      self.new(options).inspect
+    def self.inspect(options = {})
+      new(options).inspect
     end

     def initialize(options)
-      @ignored_models = ( options[:ignored_models] || [] ) + IGNORED_AR_INTERNALS
+      @ignored_models = (options[:ignored_models] || []) + IGNORED_AR_INTERNALS
       @ignored_adapters = options[:ignored_adapters] || []
     end

@@ -29,11 +29,11 @@ module DatabasePlumber
       return 0 if no_table?(model)
       model.count
     rescue ActiveRecord::StatementInvalid
-      fail InvalidModelError, "#{model} does not have a valid table definition"
+      raise InvalidModelError, "#{model} does not have a valid table definition"
     end

     def mop_up(model)
-      model.destroy_all
+      model.destroy_all unless model.name =~ /^HABTM_/
     end

     def no_table?(model)
@@ -48,6 +48,8 @@ module DatabasePlumber

     def model_space
       ActiveRecord::Base.descendants
+    rescue  ActiveRecord::StatementInvalid
+      []
     end
   end
 end
diff --git a/spec/lib/database_plumber/leak_finder_spec.rb b/spec/lib/database_plumber/leak_finder_spec.rb
index fca9b6e..6136f6c 100644
--- a/spec/lib/database_plumber/leak_finder_spec.rb
+++ b/spec/lib/database_plumber/leak_finder_spec.rb
@@ -2,11 +2,11 @@ RSpec.describe DatabasePlumber::LeakFinder do
   let(:normal_connection)   { double(:connection, adapter_name: 'NotSQLite') }
   let(:ignored_connection)  { double(:connection, adapter_name: 'SQLite'   ) }

-  let(:happy_model)           { double(:happy,    abstract_class?: nil,  connection: normal_connection,  count: 0) }
-  let(:leaky_model)           { double(:leaky,    abstract_class?: nil,  connection: normal_connection,  count: 1) }
-  let(:abstract_model)        { double(:abstract, abstract_class?: true, connection: normal_connection,  count: 2) }
-  let(:ignored_model)         { double(:ignored,  abstract_class?: nil,  connection: normal_connection,  count: 3) }
-  let(:ignored_adapter_model) { double(:anon,     abstract_class?: nil,  connection: ignored_connection, count: 4) }
+  let(:happy_model)           { double(:happy,    abstract_class?: nil,  connection: normal_connection,  count: 0, name: 'Happy') }
+  let(:leaky_model)           { double(:leaky,    abstract_class?: nil,  connection: normal_connection,  count: 1, name: 'Leaky') }
+  let(:abstract_model)        { double(:abstract, abstract_class?: true, connection: normal_connection,  count: 2, name: 'Abstract') }
+  let(:ignored_model)         { double(:ignored,  abstract_class?: nil,  connection: normal_connection,  count: 3, name: 'Ignored') }
+  let(:ignored_adapter_model) { double(:anon,     abstract_class?: nil,  connection: ignored_connection, count: 4, name: 'Anon') }

   let(:globally_ignored_models) { [ActiveRecord::SchemaMigration] }