Adicionando um arquivo de exemplo.

config/database-example.yml

@@ -0,0 +1,19 @@
+# SQLite version 3.x
+#   gem install sqlite3-ruby (not necessary on OS X Leopard)
+development:
+  adapter: sqlite3
+  database: db/development.sqlite3
+  timeout: 5000
+
+# Warning: The database defined as "test" will be erased and
+# re-generated from your development database when you run "rake".
+# Do not set this db to the same as development or production.
+test:
+  adapter: sqlite3
+  database: db/test.sqlite3
+  timeout: 5000
+
+production:
+  adapter: sqlite3
+  database: db/production.sqlite3
+  timeout: 5000