Add type annotations for the parsing exception classes

src/Parsing/OutputException.php

@@ -3,10 +3,14 @@
 namespace Sabberworm\CSS\Parsing;
 
 /**
- * Thrown if the CSS parsers attempts to print something invalid
+ * Thrown if the CSS parser attempts to print something invalid.
  */
 class OutputException extends SourceException
 {
+    /**
+     * @param string $sMessage
+     * @param int $iLineNo
+     */
     public function __construct($sMessage, $iLineNo = 0)
     {
         parent::__construct($sMessage, $iLineNo);

src/Parsing/SourceException.php

@@ -4,8 +4,15 @@
 
 class SourceException extends \Exception
 {
+    /**
+     * @var int
+     */
     private $iLineNo;
 
+    /**
+     * @param string $sMessage
+     * @param int $iLineNo
+     */
     public function __construct($sMessage, $iLineNo = 0)
     {
         $this->iLineNo = $iLineNo;
@@ -15,6 +22,9 @@ public function __construct($sMessage, $iLineNo = 0)
         parent::__construct($sMessage);
     }
 
+    /**
+     * @return int
+     */
     public function getLineNo()
     {
         return $this->iLineNo;

src/Parsing/UnexpectedEOFException.php

@@ -3,8 +3,9 @@
 namespace Sabberworm\CSS\Parsing;
 
 /**
- * Thrown if the CSS parsers encounters end of file it did not expect
- * Extends UnexpectedTokenException in order to preserve backwards compatibility
+ * Thrown if the CSS parser encounters end of file it did not expect.
+ *
+ * Extends `UnexpectedTokenException` in order to preserve backwards compatibility.
  */
 class UnexpectedEOFException extends UnexpectedTokenException
 {

src/Parsing/UnexpectedTokenException.php

@@ -3,17 +3,33 @@
 namespace Sabberworm\CSS\Parsing;
 
 /**
- * Thrown if the CSS parsers encounters a token it did not expect
+ * Thrown if the CSS parser encounters a token it did not expect.
  */
 class UnexpectedTokenException extends SourceException
 {
+    /**
+     * @var string
+     */
     private $sExpected;
 
+    /**
+     * @var string
+     */
     private $sFound;
 
-    // Possible values: literal, identifier, count, expression, search
+    /**
+     * Possible values: literal, identifier, count, expression, search
+     *
+     * @var string
+     */
     private $sMatchType;
 
+    /**
+     * @param string $sExpected
+     * @param string $sFound
+     * @param string $sMatchType
+     * @param int $iLineNo
+     */
     public function __construct($sExpected, $sFound, $sMatchType = 'literal', $iLineNo = 0)
     {
         $this->sExpected = $sExpected;