diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 000000000..0d5fa6143
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,13 @@
+inherit_from: .rubocop_todo.yml
+
+Style/HashSyntax:
+  EnforcedStyle: hash_rockets
+
+Style/StringLiterals:
+  EnforcedStyle: double_quotes
+
+Style/StringLiteralsInInterpolation:
+  EnforcedStyle: double_quotes
+
+Style/SignalException:
+  EnforcedStyle: only_raise
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 000000000..5fcb11c99
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,190 @@
+# This configuration was generated by `rubocop --auto-gen-config`
+# on 2014-11-08 22:49:55 +0900 using RuboCop version 0.27.1.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 1
+Lint/AmbiguousOperator:
+  Enabled: false
+
+# Offense count: 22
+Lint/AmbiguousRegexpLiteral:
+  Enabled: false
+
+# Offense count: 1
+Lint/Debugger:
+  Enabled: false
+
+# Offense count: 1
+Lint/ElseLayout:
+  Enabled: false
+
+# Offense count: 1
+# Configuration parameters: AlignWith, SupportedStyles.
+Lint/EndAlignment:
+  Enabled: false
+
+# Offense count: 8
+Lint/HandleExceptions:
+  Enabled: false
+
+# Offense count: 1
+Lint/ShadowingOuterLocalVariable:
+  Enabled: false
+
+# Offense count: 1
+Lint/UselessAccessModifier:
+  Enabled: false
+
+# Offense count: 2
+Lint/Void:
+  Enabled: false
+
+# Offense count: 286
+Metrics/AbcSize:
+  Max: 296
+
+# Offense count: 13
+Metrics/BlockNesting:
+  Max: 5
+
+# Offense count: 24
+# Configuration parameters: CountComments.
+Metrics/ClassLength:
+  Max: 656
+
+# Offense count: 70
+Metrics/CyclomaticComplexity:
+  Max: 86
+
+# Offense count: 1866
+# Configuration parameters: AllowURI, URISchemes.
+Metrics/LineLength:
+  Max: 431
+
+# Offense count: 292
+# Configuration parameters: CountComments.
+Metrics/MethodLength:
+  Max: 260
+
+# Offense count: 1
+# Configuration parameters: CountKeywordArgs.
+Metrics/ParameterLists:
+  Max: 8
+
+# Offense count: 66
+Metrics/PerceivedComplexity:
+  Max: 86
+
+# Offense count: 23
+Style/AccessorMethodName:
+  Enabled: false
+
+# Offense count: 3
+Style/AsciiComments:
+  Enabled: false
+
+# Offense count: 11
+# Configuration parameters: IndentWhenRelativeTo, SupportedStyles, IndentOneStep.
+Style/CaseIndentation:
+  Enabled: false
+
+# Offense count: 30
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/ClassAndModuleChildren:
+  Enabled: false
+
+# Offense count: 418
+Style/Documentation:
+  Enabled: false
+
+# Offense count: 1
+Style/DoubleNegation:
+  Enabled: false
+
+# Offense count: 2
+Style/EachWithObject:
+  Enabled: false
+
+# Offense count: 7
+# Configuration parameters: Exclude.
+Style/FileName:
+  Enabled: false
+
+# Offense count: 4
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/For:
+  Enabled: false
+
+# Offense count: 69
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/FormatString:
+  Enabled: false
+
+# Offense count: 63
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Enabled: false
+
+# Offense count: 122
+# Configuration parameters: MaxLineLength.
+Style/IfUnlessModifier:
+  Enabled: false
+
+# Offense count: 22
+Style/Lambda:
+  Enabled: false
+
+# Offense count: 1
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/MethodName:
+  Enabled: false
+
+# Offense count: 3
+Style/MultilineTernaryOperator:
+  Enabled: false
+
+# Offense count: 7
+# Configuration parameters: EnforcedStyle, MinBodyLength, SupportedStyles.
+Style/Next:
+  Enabled: false
+
+# Offense count: 17
+Style/OneLineConditional:
+  Enabled: false
+
+# Offense count: 21
+# Configuration parameters: NamePrefix, NamePrefixBlacklist.
+Style/PredicateName:
+  Enabled: false
+
+# Offense count: 3
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/RaiseArgs:
+  Enabled: false
+
+# Offense count: 11
+# Configuration parameters: MaxSlashes.
+Style/RegexpLiteral:
+  Enabled: false
+
+# Offense count: 12
+Style/RescueModifier:
+  Enabled: false
+
+# Offense count: 1
+Style/SelfAssignment:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: ExactNameMatch, AllowPredicates, AllowDSLWriters, Whitelist.
+Style/TrivialAccessors:
+  Enabled: false
+
+# Offense count: 5
+# Configuration parameters: MaxLineLength.
+Style/WhileUntilModifier:
+  Enabled: false