add strict typing

src/Element.php

@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * phpDocumentor
  *

src/File.php

@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * This file is part of phpDocumentor.
  *

src/Fqsen.php

@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * phpDocumentor
  *
@@ -31,11 +33,9 @@ final class Fqsen
     /**
      * Initializes the object.
      *
-     * @param string $fqsen
-     *
-     * @throws \InvalidArgumentException when $fqsen is not matching the format.
+     * @throws InvalidArgumentException when $fqsen is not matching the format.
      */
-    public function __construct($fqsen)
+    public function __construct(string $fqsen)
     {
         $matches = [];
         $result = preg_match(
@@ -62,20 +62,16 @@ public function __construct($fqsen)
 
     /**
      * converts this class to string.
-     *
-     * @return string
      */
-    public function __toString()
+    public function __toString(): string
     {
         return $this->fqsen;
     }
 
     /**
      * Returns the name of the element without path.
-     *
-     * @return string
      */
-    public function getName()
+    public function getName(): string
     {
         return $this->name;
     }

src/Location.php

@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * This file is part of phpDocumentor.
  *
@@ -25,32 +27,25 @@ final class Location
 
     /**
      * Initializes the location for an element using its line number in the file and optionally the column number.
-     *
-     * @param int $lineNumber
-     * @param int $columnNumber
      */
-    public function __construct($lineNumber, $columnNumber = 0)
+    public function __construct(int $lineNumber, int $columnNumber = 0)
     {
         $this->lineNumber = $lineNumber;
         $this->columnNumber = $columnNumber;
     }
 
     /**
      * Returns the line number that is covered by this location.
-     *
-     * @return integer
      */
-    public function getLineNumber()
+    public function getLineNumber(): int
     {
         return $this->lineNumber;
     }
 
     /**
      * Returns the column number (character position on a line) for this location object.
-     *
-     * @return integer
      */
-    public function getColumnNumber()
+    public function getColumnNumber(): int
     {
         return $this->columnNumber;
     }

src/Project.php

@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * phpDocumentor
  *
@@ -21,5 +23,5 @@ interface Project
      *
      * @return string
      */
-    public function getName();
+    public function getName(): string;
 }

src/ProjectFactory.php

@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * phpDocumentor
  *
@@ -24,5 +26,5 @@ interface ProjectFactory
      * @param File[] $files
      * @return Project
      */
-    public function create($name, array $files);
+    public function create($name, array $files): Project;
 }