diff --git a/.php_cs b/.php_cs
index 0c6b9ead7..a2bd217ed 100644
--- a/.php_cs
+++ b/.php_cs
@@ -1,5 +1,15 @@
 <?php
 
+$header = <<<EOF
+This file is part of Composer.
+
+(c) Nils Adermann <naderman@naderman.de>
+    Jordi Boggiano <j.boggiano@seld.be>
+
+For the full copyright and license information, please view the LICENSE
+file that was distributed with this source code.
+EOF;
+
 $finder = Symfony\CS\Finder\DefaultFinder::create()
     ->files()
     ->name('*.php')
@@ -15,9 +25,14 @@ return Symfony\CS\Config\Config::create()
         '@PSR2' => true,
         'duplicate_semicolon' => true,
         'extra_empty_lines' => true,
+        'header_comment' => array('header' => $header),
         'include' => true,
+        'long_array_syntax' => true,
+        'method_separation' => true,
         'multiline_array_trailing_comma' => true,
         'namespace_no_leading_whitespace' => true,
+        'no_blank_lines_after_class_opening' => true,
+        'no_empty_lines_after_phpdocs' => true,
         'object_operator' => true,
         'operators_spaces' => true,
         'phpdoc_align' => true,
@@ -30,7 +45,10 @@ return Symfony\CS\Config\Config::create()
         'phpdoc_type_to_var' => true,
         'psr0' => true,
         'return' => true,
+        'remove_leading_slash_use' => true,
+        'remove_lines_between_uses' => true,
         'single_array_no_trailing_comma' => true,
+        'single_blank_line_before_namespace' => true,
         'spaces_cast' => true,
         'standardize_not_equal' => true,
         'ternary_spaces' => true,
diff --git a/src/Composer/Autoload/ClassMapGenerator.php b/src/Composer/Autoload/ClassMapGenerator.php
index 5484b7d41..7f7e7e1eb 100644
--- a/src/Composer/Autoload/ClassMapGenerator.php
+++ b/src/Composer/Autoload/ClassMapGenerator.php
@@ -1,14 +1,19 @@
 <?php
 
 /*
- * This file is copied from the Symfony package.
+ * This file is part of Composer.
  *
- * (c) Fabien Potencier <fabien@symfony.com>
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
+ */
+
+/*
+ * This file is copied from the Symfony package.
  *
- * @license MIT
+ * (c) Fabien Potencier <fabien@symfony.com>
  */
 
 namespace Composer\Autoload;
diff --git a/src/Composer/DependencyResolver/PolicyInterface.php b/src/Composer/DependencyResolver/PolicyInterface.php
index 433478920..b68cfffb8 100644
--- a/src/Composer/DependencyResolver/PolicyInterface.php
+++ b/src/Composer/DependencyResolver/PolicyInterface.php
@@ -20,6 +20,8 @@ use Composer\Package\PackageInterface;
 interface PolicyInterface
 {
     public function versionCompare(PackageInterface $a, PackageInterface $b, $operator);
+
     public function findUpdatePackages(Pool $pool, array $installedMap, PackageInterface $package);
+
     public function selectPreferredPackages(Pool $pool, array $installedMap, array $literals);
 }
diff --git a/src/Composer/DependencyResolver/Solver.php b/src/Composer/DependencyResolver/Solver.php
index 0568a4d2c..712e1b5cd 100644
--- a/src/Composer/DependencyResolver/Solver.php
+++ b/src/Composer/DependencyResolver/Solver.php
@@ -23,25 +23,44 @@ class Solver
     const BRANCH_LITERALS = 0;
     const BRANCH_LEVEL = 1;
 
+    /** @var PolicyInterface */
     protected $policy;
+    /** @var Pool */
     protected $pool;
+    /** @var RepositoryInterface */
     protected $installed;
+    /** @var Ruleset */
     protected $rules;
+    /** @var RuleSetGenerator */
     protected $ruleSetGenerator;
-    protected $updateAll;
+    /** @var array */
+    protected $jobs;
 
-    protected $addedMap = array();
+    /** @var int[] */
     protected $updateMap = array();
+    /** @var RuleWatchGraph */
     protected $watchGraph;
+    /** @var Decisions */
     protected $decisions;
+    /** @var int[] */
     protected $installedMap;
 
+    /** @var int */
     protected $propagateIndex;
+    /** @var array[] */
     protected $branches = array();
+    /** @var Problem[] */
     protected $problems = array();
+    /** @var array */
     protected $learnedPool = array();
+    /** @var array */
     protected $learnedWhy = array();
 
+    /**
+     * @param PolicyInterface     $policy
+     * @param Pool                $pool
+     * @param RepositoryInterface $installed
+     */
     public function __construct(PolicyInterface $policy, Pool $pool, RepositoryInterface $installed)
     {
         $this->policy = $policy;
@@ -50,12 +69,16 @@ class Solver
         $this->ruleSetGenerator = new RuleSetGenerator($policy, $pool);
     }
 
+    /**
+     * @return int
+     */
     public function getRuleSetSize()
     {
         return count($this->rules);
     }
 
     // aka solver_makeruledecisions
+
     private function makeAssertionRuleDecisions()
     {
         $decisionStart = count($this->decisions) - 1;
@@ -135,6 +158,9 @@ class Solver
         }
     }
 
+    /**
+     * @param bool $ignorePlatformReqs
+     */
     protected function checkForRootRequireProblems($ignorePlatformReqs)
     {
         foreach ($this->jobs as $job) {
@@ -169,6 +195,11 @@ class Solver
         }
     }
 
+    /**
+     * @param  Request $request
+     * @param  bool    $ignorePlatformReqs
+     * @return array
+     */
     public function solve(Request $request, $ignorePlatformReqs = false)
     {
         $this->jobs = $request->getJobs();
@@ -243,6 +274,8 @@ class Solver
 
     /**
      * Reverts a decision at the given level.
+     *
+     * @param int $level
      */
     private function revert($level)
     {
@@ -268,8 +301,7 @@ class Solver
         }
     }
 
-    /**-------------------------------------------------------------------
-     *
+    /**
      * setpropagatelearn
      *
      * add free decision (a positive literal) to decision queue
@@ -282,6 +314,11 @@ class Solver
      *
      * returns the new solver level or 0 if unsolvable
      *
+     * @param  int        $level
+     * @param  string|int $literal
+     * @param  bool       $disableRules
+     * @param  Rule       $rule
+     * @return int
      */
     private function setPropagateLearn($level, $literal, $disableRules, Rule $rule)
     {
@@ -331,6 +368,13 @@ class Solver
         return $level;
     }
 
+    /**
+     * @param  int   $level
+     * @param  array $decisionQueue
+     * @param  bool  $disableRules
+     * @param  Rule  $rule
+     * @return int
+     */
     private function selectAndInstall($level, array $decisionQueue, $disableRules, Rule $rule)
     {
         // choose best package to install from decisionQueue
@@ -346,7 +390,12 @@ class Solver
         return $this->setPropagateLearn($level, $selectedLiteral, $disableRules, $rule);
     }
 
-    protected function analyze($level, $rule)
+    /**
+     * @param  int   $level
+     * @param  Rule  $rule
+     * @return array
+     */
+    protected function analyze($level, Rule $rule)
     {
         $analyzedRule = $rule;
         $ruleLevel = 1;
@@ -452,7 +501,11 @@ class Solver
         return array($learnedLiterals[0], $ruleLevel, $newRule, $why);
     }
 
-    private function analyzeUnsolvableRule($problem, $conflictRule)
+    /**
+     * @param Problem $problem
+     * @param Rule    $conflictRule
+     */
+    private function analyzeUnsolvableRule(Problem $problem, Rule $conflictRule)
     {
         $why = spl_object_hash($conflictRule);
 
@@ -476,7 +529,12 @@ class Solver
         $problem->addRule($conflictRule);
     }
 
-    private function analyzeUnsolvable($conflictRule, $disableRules)
+    /**
+     * @param  Rule $conflictRule
+     * @param  bool $disableRules
+     * @return int
+     */
+    private function analyzeUnsolvable(Rule $conflictRule, $disableRules)
     {
         $problem = new Problem($this->pool);
         $problem->addRule($conflictRule);
@@ -533,7 +591,10 @@ class Solver
         return 0;
     }
 
-    private function disableProblem($why)
+    /**
+     * @param Rule $why
+     */
+    private function disableProblem(Rule $why)
     {
         $job = $why->getJob();
 
@@ -545,6 +606,7 @@ class Solver
 
         // disable all rules of this job
         foreach ($this->rules as $rule) {
+            /** @var Rule $rule */
             if ($job === $rule->getJob()) {
                 $rule->disable();
             }
@@ -562,13 +624,13 @@ class Solver
         $this->makeAssertionRuleDecisions();
     }
 
-    /*-------------------------------------------------------------------
-    * enable/disable learnt rules
-    *
-    * we have enabled or disabled some of our rules. We now re-enable all
-    * of our learnt rules except the ones that were learnt from rules that
-    * are now disabled.
-    */
+    /**
+     * enable/disable learnt rules
+     *
+     * we have enabled or disabled some of our rules. We now re-enable all
+     * of our learnt rules except the ones that were learnt from rules that
+     * are now disabled.
+     */
     private function enableDisableLearnedRules()
     {
         foreach ($this->rules->getIteratorFor(RuleSet::TYPE_LEARNED) as $rule) {
@@ -591,22 +653,28 @@ class Solver
         }
     }
 
+    /**
+     * @param bool $disableRules
+     */
     private function runSat($disableRules = true)
     {
         $this->propagateIndex = 0;
 
-        //   /*
-        //    * here's the main loop:
-        //    * 1) propagate new decisions (only needed once)
-        //    * 2) fulfill jobs
-        //    * 3) fulfill all unresolved rules
-        //    * 4) minimalize solution if we had choices
-        //    * if we encounter a problem, we rewind to a safe level and restart
-        //    * with step 1
-        //    */
+        /*
+         * here's the main loop:
+         * 1) propagate new decisions (only needed once)
+         * 2) fulfill jobs
+         * 3) fulfill all unresolved rules
+         * 4) minimalize solution if we had choices
+         * if we encounter a problem, we rewind to a safe level and restart
+         * with step 1
+         */
 
         $decisionQueue = array();
         $decisionSupplementQueue = array();
+        /**
+         * @todo this makes $disableRules always false; determine the rationale and possibly remove dead code?
+         */
         $disableRules = array();
 
         $level = 1;
diff --git a/src/Composer/Package/AliasPackage.php b/src/Composer/Package/AliasPackage.php
index 8e1bb88fe..9541d3359 100644
--- a/src/Composer/Package/AliasPackage.php
+++ b/src/Composer/Package/AliasPackage.php
@@ -197,162 +197,202 @@ class AliasPackage extends BasePackage implements CompletePackageInterface
     {
         return $this->aliasOf->getType();
     }
+
     public function getTargetDir()
     {
         return $this->aliasOf->getTargetDir();
     }
+
     public function getExtra()
     {
         return $this->aliasOf->getExtra();
     }
+
     public function setInstallationSource($type)
     {
         $this->aliasOf->setInstallationSource($type);
     }
+
     public function getInstallationSource()
     {
         return $this->aliasOf->getInstallationSource();
     }
+
     public function getSourceType()
     {
         return $this->aliasOf->getSourceType();
     }
+
     public function getSourceUrl()
     {
         return $this->aliasOf->getSourceUrl();
     }
+
     public function getSourceUrls()
     {
         return $this->aliasOf->getSourceUrls();
     }
+
     public function getSourceReference()
     {
         return $this->aliasOf->getSourceReference();
     }
+
     public function setSourceReference($reference)
     {
         return $this->aliasOf->setSourceReference($reference);
     }
+
     public function setSourceMirrors($mirrors)
     {
         return $this->aliasOf->setSourceMirrors($mirrors);
     }
+
     public function getSourceMirrors()
     {
         return $this->aliasOf->getSourceMirrors();
     }
+
     public function getDistType()
     {
         return $this->aliasOf->getDistType();
     }
+
     public function getDistUrl()
     {
         return $this->aliasOf->getDistUrl();
     }
+
     public function getDistUrls()
     {
         return $this->aliasOf->getDistUrls();
     }
+
     public function getDistReference()
     {
         return $this->aliasOf->getDistReference();
     }
+
     public function setDistReference($reference)
     {
         return $this->aliasOf->setDistReference($reference);
     }
+
     public function getDistSha1Checksum()
     {
         return $this->aliasOf->getDistSha1Checksum();
     }
+
     public function setTransportOptions(array $options)
     {
         return $this->aliasOf->setTransportOptions($options);
     }
+
     public function getTransportOptions()
     {
         return $this->aliasOf->getTransportOptions();
     }
+
     public function setDistMirrors($mirrors)
     {
         return $this->aliasOf->setDistMirrors($mirrors);
     }
+
     public function getDistMirrors()
     {
         return $this->aliasOf->getDistMirrors();
     }
+
     public function getScripts()
     {
         return $this->aliasOf->getScripts();
     }
+
     public function getLicense()
     {
         return $this->aliasOf->getLicense();
     }
+
     public function getAutoload()
     {
         return $this->aliasOf->getAutoload();
     }
+
     public function getDevAutoload()
     {
         return $this->aliasOf->getDevAutoload();
     }
+
     public function getIncludePaths()
     {
         return $this->aliasOf->getIncludePaths();
     }
+
     public function getRepositories()
     {
         return $this->aliasOf->getRepositories();
     }
+
     public function getReleaseDate()
     {
         return $this->aliasOf->getReleaseDate();
     }
+
     public function getBinaries()
     {
         return $this->aliasOf->getBinaries();
     }
+
     public function getKeywords()
     {
         return $this->aliasOf->getKeywords();
     }
+
     public function getDescription()
     {
         return $this->aliasOf->getDescription();
     }
+
     public function getHomepage()
     {
         return $this->aliasOf->getHomepage();
     }
+
     public function getSuggests()
     {
         return $this->aliasOf->getSuggests();
     }
+
     public function getAuthors()
     {
         return $this->aliasOf->getAuthors();
     }
+
     public function getSupport()
     {
         return $this->aliasOf->getSupport();
     }
+
     public function getNotificationUrl()
     {
         return $this->aliasOf->getNotificationUrl();
     }
+
     public function getArchiveExcludes()
     {
         return $this->aliasOf->getArchiveExcludes();
     }
+
     public function isAbandoned()
     {
         return $this->aliasOf->isAbandoned();
     }
+
     public function getReplacementPackage()
     {
         return $this->aliasOf->getReplacementPackage();
     }
+
     public function __toString()
     {
         return parent::__toString().' (alias of '.$this->aliasOf->getVersion().')';
diff --git a/src/Composer/Util/ProcessExecutor.php b/src/Composer/Util/ProcessExecutor.php
index 38f5bba00..f9499f09f 100644
--- a/src/Composer/Util/ProcessExecutor.php
+++ b/src/Composer/Util/ProcessExecutor.php
@@ -113,7 +113,6 @@ class ProcessExecutor
      *
      * @return string The escaped argument
      */
-
     public static function escape($argument)
     {
         return ProcessUtils::escapeArgument($argument);
diff --git a/tests/Composer/Test/Autoload/ClassLoaderTest.php b/tests/Composer/Test/Autoload/ClassLoaderTest.php
index 50772101e..d341b393b 100644
--- a/tests/Composer/Test/Autoload/ClassLoaderTest.php
+++ b/tests/Composer/Test/Autoload/ClassLoaderTest.php
@@ -1,5 +1,15 @@
 <?php
 
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Composer\Test\Autoload;
 
 use Composer\Autoload\ClassLoader;
diff --git a/tests/Composer/Test/Autoload/ClassMapGeneratorTest.php b/tests/Composer/Test/Autoload/ClassMapGeneratorTest.php
index 468f72378..3b703d8f3 100644
--- a/tests/Composer/Test/Autoload/ClassMapGeneratorTest.php
+++ b/tests/Composer/Test/Autoload/ClassMapGeneratorTest.php
@@ -1,14 +1,21 @@
 <?php
 
 /*
- * This file was copied from the Symfony package.
+ * This file is part of Composer.
  *
- * (c) Fabien Potencier <fabien@symfony.com>
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 
+/*
+ * This file is copied from the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ */
+
 namespace Composer\Test\Autoload;
 
 use Composer\Autoload\ClassMapGenerator;
diff --git a/tests/Composer/Test/DependencyResolver/SolverTest.php b/tests/Composer/Test/DependencyResolver/SolverTest.php
index 2c67d7464..ed62e3d79 100644
--- a/tests/Composer/Test/DependencyResolver/SolverTest.php
+++ b/tests/Composer/Test/DependencyResolver/SolverTest.php
@@ -9,6 +9,7 @@
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
+
 namespace Composer\Test\DependencyResolver;
 
 use Composer\Repository\ArrayRepository;
diff --git a/tests/Composer/Test/Util/GitHubTest.php b/tests/Composer/Test/Util/GitHubTest.php
index 83d18dbe4..a39f3dab9 100644
--- a/tests/Composer/Test/Util/GitHubTest.php
+++ b/tests/Composer/Test/Util/GitHubTest.php
@@ -1,14 +1,14 @@
 <?php
 
 /*
-* This file is part of Composer.
-*
-* (c) Nils Adermann <naderman@naderman.de>
-*     Jordi Boggiano <j.boggiano@seld.be>
-*
-* For the full copyright and license information, please view the LICENSE
-* file that was distributed with this source code.
-*/
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
 
 namespace Composer\Test\Util;
 
diff --git a/tests/Composer/Test/Util/SvnTest.php b/tests/Composer/Test/Util/SvnTest.php
index c54c9c504..55a116376 100644
--- a/tests/Composer/Test/Util/SvnTest.php
+++ b/tests/Composer/Test/Util/SvnTest.php
@@ -1,4 +1,15 @@
 <?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Composer\Test\Util;
 
 use Composer\Config;