diff --git a/src/ros_license_toolkit/license_checks/license_file_referenced_check.py b/src/ros_license_toolkit/license_checks/license_file_referenced_check.py
index e3311ea..a657ff1 100644
--- a/src/ros_license_toolkit/license_checks/license_file_referenced_check.py
+++ b/src/ros_license_toolkit/license_checks/license_file_referenced_check.py
@@ -26,44 +26,54 @@
 class LicenseFilesReferencedCheck(Check):
     """Check if all found License file have a reference in package.xml."""
 
+    def __init__(self: 'LicenseFilesReferencedCheck'):
+        Check.__init__(self)
+        self.not_covered_texts: Dict[str, str] = {}
+        self.inofficial_covered_texts: Dict[str, List[str]] = {}
+
     def _check(self, package: Package):
-        not_covered_texts: Dict[str, str] = {}
-        inofficial_covered_texts: Dict[str, List[str]] = {}
         for filename, license_text in package.found_license_texts.items():
             # skipping all declarations above the package
             if not is_in_package(package, filename):
                 continue
-            if 'detected_license_expression_spdx' in license_text and \
-               license_text['detected_license_expression_spdx'] not in \
-               package.license_tags:
-                spdx_expression = license_text[
-                    'detected_license_expression_spdx']
-                inofficial_licenses = {
-                    lic_tag.id_from_license_text: key
-                    for key, lic_tag in package.license_tags.items()
-                    if lic_tag.id_from_license_text != ''}
-                if spdx_expression in inofficial_licenses:
-                    inofficial_covered_texts[filename] = \
-                        [spdx_expression,
-                         inofficial_licenses[spdx_expression]]
-                else:
-                    not_covered_texts[filename] = \
-                        spdx_expression
-        if not_covered_texts:
+            self._handle_inofficial_licenses(package, filename, license_text)
+        self._evaluate_results()
+
+    def _handle_inofficial_licenses(self, package: Package,
+                                    filename, license_text):
+        if 'detected_license_expression_spdx' in license_text and \
+                license_text['detected_license_expression_spdx'] not in \
+                package.license_tags:
+            spdx_expression = license_text[
+                'detected_license_expression_spdx']
+            inofficial_licenses = {
+                lic_tag.id_from_license_text: key
+                for key, lic_tag in package.license_tags.items()
+                if lic_tag.id_from_license_text != ''}
+            if spdx_expression in inofficial_licenses:
+                self.inofficial_covered_texts[filename] = \
+                    [spdx_expression,
+                        inofficial_licenses[spdx_expression]]
+            else:
+                self.not_covered_texts[filename] = \
+                    spdx_expression
+
+    def _evaluate_results(self):
+        if self.not_covered_texts:
             info_str = ''
             info_str += 'The following license files are not' +\
                 ' mentioned by any tag:\n' +\
                 '\n'.join(
                     [f"  '{x[0]}' is of {x[1]}."
-                     for x in not_covered_texts.items()])
+                     for x in self.not_covered_texts.items()])
             self._failed(info_str)
-        elif inofficial_covered_texts:
+        elif self.inofficial_covered_texts:
             info_str = ''
             info_str += 'The following license files are not' +\
                 ' mentioned by any tag:\n' +\
                 '\n'.join(
                     [f"  '{x[0]}' is of {x[1][0]} but its tag is {x[1][1]}."
-                     for x in inofficial_covered_texts.items()])
+                     for x in self.inofficial_covered_texts.items()])
             self._warning(info_str)
         else:
             self._success("All license declaration are referenced by a tag.")