diff --git a/django/db/backends/ado_mssql/query.py b/django/db/backends/ado_mssql/query.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/django/db/backends/dummy/query.py b/django/db/backends/dummy/query.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/django/db/backends/mysql/query.py b/django/db/backends/mysql/query.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/django/db/backends/oracle/query.py b/django/db/backends/oracle/query.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/django/db/backends/postgresql/query.py b/django/db/backends/postgresql/query.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/django/db/backends/postgresql_psycopg2/query.py b/django/db/backends/postgresql_psycopg2/query.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/django/db/backends/sqlite3/query.py b/django/db/backends/sqlite3/query.py
new file mode 100644
index 0000000000..e69de29bb2