diff --git a/README.md b/README.md
index 50f62da..97a354b 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ With composer simply
 then call the script you need
 
 ##Manually
-Clone this repository somewhere your your build plan can be accessed, composer install (required for the class loader only)
+Clone this repository somewhere your your build plan can be accessed, composer install is prefered but there is a non composer class loader which will be used if composer is not installed.
 Then call the script you need
 
 
@@ -40,7 +40,7 @@ exit code 0 and no output indicates success
 
     php vendor/bin/phpunitDiffFilter /tmp/diff.txt report/coverage.xml  90
     
-Will fail (exit status 1) if less than 90% of the code committed is covered by a test.
+Will fail (exit status 2) if less than 90% of the code committed is covered by a test.
 This requires phpunit to be run on the branch first!
 
 ##phpcs
@@ -51,7 +51,7 @@ All of the commands can read from stdin with placeholder `-`
     
 phpcs can be run with any options you normally have for example `--standard=PSR2`
 
-This will exit with code 1 if any of the new/edited code fails the code standards check. The output is kept so you can see what the offending lines are and what the error is.
+This will exit with code 2 if any of the new/edited code fails the code standards check. The output is kept so you can see what the offending lines are and what the error is.
 
 
 ##phpmd
@@ -62,4 +62,4 @@ All of the commands can read from stdin with placeholder `-`
     
 phpcs can be run with any options you normally have for example `cleancode,codesize,controversial`
 
-This will exit with code 1 if any of the new/edited code fails the code standards check. The output is kept so you can see what the offending lines are and what the error is.
+This will exit with code 2 if any of the new/edited code fails the code standards check. The output is kept so you can see what the offending lines are and what the error is.
diff --git a/bin/phpcsDiffFilter b/bin/phpcsDiffFilter
index 14d6106..9c94f4b 100755
--- a/bin/phpcsDiffFilter
+++ b/bin/phpcsDiffFilter
@@ -1,16 +1,34 @@
 #!/usr/bin/env php
 <?php
+$locations = [
+    __DIR__ . '/../vendor/autoload.php',
+    __DIR__ . '/vendor/autoload.php',
+    __DIR__ . '/../autoload.php'
+];
 
-foreach (array(__DIR__ . '/../../autoload.php', __DIR__ . '/../vendor/autoload.php', __DIR__ . '/vendor/autoload.php') as $file) {
+$found = false;
+
+foreach ($locations as $file) {
     if (file_exists($file)) {
         require_once($file);
-
+        $found = true;
         break;
     }
 }
 
+if (!$found) {
+    error_log(
+        "Can't find the autoload file," .
+        "please make sure 'composer install' has been run"
+    );
+
+    exit(1);
+}
+
 if (!isset($argv[1], $argv[2])) {
-    echo "Missing arguments, please call with diff and check file" . PHP_EOL;
+    error_log(
+        "Missing arguments, please call with diff and check file"
+    );
     exit(1);
 }
 
diff --git a/bin/phpmdDiffFilter b/bin/phpmdDiffFilter
index 8ad8896..85702a5 100755
--- a/bin/phpmdDiffFilter
+++ b/bin/phpmdDiffFilter
@@ -1,16 +1,34 @@
 #!/usr/bin/env php
 <?php
+$locations = [
+    __DIR__ . '/../vendor/autoload.php',
+    __DIR__ . '/vendor/autoload.php',
+    __DIR__ . '/../autoload.php'
+];
 
-foreach (array(__DIR__ . '/../../autoload.php', __DIR__ . '/../vendor/autoload.php', __DIR__ . '/vendor/autoload.php') as $file) {
+$found = false;
+
+foreach ($locations as $file) {
     if (file_exists($file)) {
         require_once($file);
-
+        $found = true;
         break;
     }
 }
 
+if (!$found) {
+    error_log(
+        "Can't find the autoload file," .
+        "please make sure 'composer install' has been run"
+    );
+
+    exit(1);
+}
+
 if (!isset($argv[1], $argv[2])) {
-    echo "Missing arguments, please call with diff and check file" . PHP_EOL;
+    error_log(
+        "Missing arguments, please call with diff and check file"
+    );
     exit(1);
 }
 
diff --git a/bin/phpunitDiffFilter b/bin/phpunitDiffFilter
index 1334cfd..5a95da7 100755
--- a/bin/phpunitDiffFilter
+++ b/bin/phpunitDiffFilter
@@ -1,16 +1,34 @@
 #!/usr/bin/env php
 <?php
+$locations = [
+    __DIR__ . '/../vendor/autoload.php',
+    __DIR__ . '/vendor/autoload.php',
+    __DIR__ . '/../autoload.php'
+];
 
-foreach (array(__DIR__ . '/../../autoload.php', __DIR__ . '/../vendor/autoload.php', __DIR__ . '/vendor/autoload.php') as $file) {
+$found = false;
+
+foreach ($locations as $file) {
     if (file_exists($file)) {
         require_once($file);
-
+        $found = true;
         break;
     }
 }
 
+if (!$found) {
+    error_log(
+        "Can't find the autoload file," .
+        "please make sure 'composer install' has been run"
+    );
+
+    exit(1);
+}
+
 if (!isset($argv[1], $argv[2])) {
-    echo "Missing arguments, please call with diff and check file" . PHP_EOL;
+    error_log(
+        "Missing arguments, please call with diff and check file"
+    );
     exit(1);
 }
 
diff --git a/src/DiffFileLoader.php b/src/DiffFileLoader.php
index 533eea0..ddb2314 100644
--- a/src/DiffFileLoader.php
+++ b/src/DiffFileLoader.php
@@ -21,16 +21,17 @@ public function __construct($fileName)
     {
         $this->fileLocation = $fileName;
         $this->diff = new DiffFileState();
+
     }
 
     public function getChangedLines()
     {
-        $handle = @fopen($this->fileLocation, "r");
-
-        if (!$handle) {
+        if (!is_readable($this->fileLocation)) {
             throw new InvalidArgumentException("Can't read file");
         }
 
+        $handle = fopen($this->fileLocation, 'r');
+
         while (($line = fgets($handle)) !== false) {
             // process the line read.
             $lineHandle = $this->getLineHandle($line);
diff --git a/tests/DiffFileLoadTest.php b/tests/DiffFileLoadTest.php
index 8619c7d..cbfffbe 100644
--- a/tests/DiffFileLoadTest.php
+++ b/tests/DiffFileLoadTest.php
@@ -27,26 +27,26 @@ public function getResults()
     {
         return [
             'newFile' => [
-                __DIR__ . "/fixtures/newFile.txt",
+                __DIR__ . '/fixtures/newFile.txt',
                 [
                     'changedFile.php' => [1,2,3]
                 ]
             ],
             'lineChange' => [
-                __DIR__ . "/fixtures/change.txt",
+                __DIR__ . '/fixtures/change.txt',
                 [
                     'changedFile.php' => [3]
                 ]
             ],
             'multipleFiles' => [
-                __DIR__ . "/fixtures/multiple.txt",
+                __DIR__ . '/fixtures/multiple.txt',
                 [
                     'changedFile.php' => [3],
                     'newFile.php' => [1,2,3]
                 ]
             ],
             'removeFile' => [
-                __DIR__ . "/fixtures/removeFile.txt",
+                __DIR__ . '/fixtures/removeFile.txt',
                 []
             ],
         ];