1 files changed, 30 insertions, 0 deletions
diff --git a/gems/gitlab-schema-validation/lib/gitlab/schema/validation/validators/base.rb b/gems/gitlab-schema-validation/lib/gitlab/schema/validation/validators/base.rb
new file mode 100644
index 00000000000..de1351a3a02
--- /dev/null
+++ b/gems/gitlab-schema-validation/lib/gitlab/schema/validation/validators/base.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Schema
+    module Validation
+      module Validators
+        class Base
+          ERROR_MESSAGE = 'A schema inconsistency has been found'
+
+          def initialize(structure_sql, database)
+            @structure_sql = structure_sql
+            @database = database
+          end
+
+          def execute
+            raise NoMethodError, "subclasses of #{self.class.name} must implement #{__method__}"
+          end
+
+          private
+
+          attr_reader :structure_sql, :database
+
+          def build_inconsistency(validator_class, structure_sql_object, database_object)
+            Inconsistency.new(validator_class, structure_sql_object, database_object)
+          end
+        end
+      end
+    end
+  end
+end