diff --git a/src/Exceptions/MissingParameterException.php b/src/Exceptions/MissingParameterException.php
new file mode 100644
index 0000000..fa27b3a
--- /dev/null
+++ b/src/Exceptions/MissingParameterException.php
@@ -0,0 +1,5 @@
+<?php
+namespace Ioc\Exceptions;
+
+class MissingParameterException extends \RuntimeException {
+}
\ No newline at end of file
diff --git a/src/Exceptions/ParameterMissingException.php b/src/Exceptions/ParameterMissingException.php
deleted file mode 100644
index da96d56..0000000
--- a/src/Exceptions/ParameterMissingException.php
+++ /dev/null
@@ -1,5 +0,0 @@
-<?php
-namespace Ioc\Exceptions\Exceptions;
-
-class ParameterMissingException extends \RuntimeException {
-}
\ No newline at end of file
diff --git a/src/MethodInvoker.php b/src/MethodInvoker.php
index 23ddb8e..8276c02 100644
--- a/src/MethodInvoker.php
+++ b/src/MethodInvoker.php
@@ -2,7 +2,7 @@
 namespace Ioc;
 
 use Ioc\Exceptions\DefinitionNotFoundException;
-use Ioc\Exceptions\Exceptions\ParameterMissingException;
+use Ioc\Exceptions\MissingParameterException;
 
 interface MethodInvoker {
 	/**
@@ -11,27 +11,22 @@ interface MethodInvoker {
 	 * method or a class not yet instantiated. The implementation determines how to handle the callable and find the
 	 * appropriate method for invocation. If no matching class could be found, it must throw an
 	 * Ioc\Exceptions\DefinitionNotFoundException.
-	 * 
 	 * Following forms must be accepted:
-	 * 
 	 * $methodInvoker->invoke(function () {}, $arguments);
 	 * A closure
-	 * 
 	 * $methodInvoker->invoke(array($instance, 'methodName'), $arguments);
 	 * A classic callable with an already instantiated $instance and a methodName.
-	 * 
 	 * $methodInvoker->invoke(array('Full\\Qualified\\Class\\Name', 'methodName'), $arguments);
 	 * This is not(!) a static call. Full\Qualified\Class\Name gats instantiated first before calling methodName.
-	 * 
 	 * The called method could have either scalar parameters (with or without default values) or Typehinted patemeters
 	 * mixed together. Scalar-types and array-types can not be determined automatically. They must be provided through
 	 * $arguments.
 	 *
 	 * @param callable $callable
 	 * @param array $arguments Must be an array were the keys match to the Variable-Names of the __construct'ors parameters.
-	 * @throws DefinitionNotFoundException
-	 * @throws ParameterMissingException
 	 * @return mixed
+	 *@throws MissingParameterException
+	 * @throws DefinitionNotFoundException
 	 */
 	public function invoke($callable, array $arguments = array());
 }
diff --git a/src/ObjectFactory.php b/src/ObjectFactory.php
index e385f99..ecfec59 100644
--- a/src/ObjectFactory.php
+++ b/src/ObjectFactory.php
@@ -2,7 +2,7 @@
 namespace Ioc;
 
 use Ioc\Exceptions\DefinitionNotFoundException;
-use Ioc\Exceptions\Exceptions\ParameterMissingException;
+use Ioc\Exceptions\MissingParameterException;
 
 interface ObjectFactory {
 	/**
@@ -12,9 +12,9 @@ interface ObjectFactory {
 	 *
 	 * @param string $className Must be an fully qualified class-name.
 	 * @param array $arguments Must be an array were the keys match to the Variable-Names of the __construct'ors parameters.
-	 * @throws DefinitionNotFoundException
-	 * @throws ParameterMissingException
 	 * @return mixed
+	 *@throws MissingParameterException
+	 * @throws DefinitionNotFoundException
 	 */
 	public function create($className, array $arguments = array());
 }
\ No newline at end of file