diff --git a/config/database.yml b/config/database.yml
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+# MySQL (default setup).  Versions 4.1 and 5.0 are recommended.
+#
+# Install the MySQL driver:
+#   gem install mysql
+# On MacOS X:
+#   gem install mysql -- --include=/usr/local/lib
+# On Windows:
+#   gem install mysql
+#       Choose the win32 build.
+#       Install MySQL and put its /bin directory on your path.
+#
+# And be sure to use new-style password hashing:
+#   http://dev.mysql.com/doc/refman/5.0/en/old-client.html
+development:
+  adapter: mysql
+  database: ioi
+  username: ioi
+  password: ioi
+  host: localhost
+
+# 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: mysql
+  database: grader_test
+  username: root
+  password:
+  host: localhost
+
+production:
+  adapter: mysql
+  database: ioi
+  username: ioi
+  password: mioisql
+  host: localhost