Add blacklist for invalid damage types

exceptions/MDImporterBlacklistedConcordanceTerm.php

@@ -0,0 +1,18 @@
+<?PHP
+declare(strict_types = 1);
+
+/**
+ * Exception thrown in case a requested concordance term is blacklisted.
+ */
+final class MDImporterBlacklistedConcordanceTerm extends Exception {
+    /**
+     * Error message.
+     *
+     * @return string
+     */
+    public function errorMessage() {
+        //error message
+        return 'Blacklisted term requested for concordance list.';
+
+    }
+}

src/MDConcDamageTypes.php

@@ -18,6 +18,10 @@ final class MDConcDamageTypes implements MDImporterConcordanceListInterface {
         "Desiccation" => MDObjectDamageType::desiccation,
     ];
 
+    private const DAMAGE_TYPES_BLACKLIST = [
+        'keine',
+    ];
+
     /**
      * Require a function for getting the concordance target.
      *
@@ -28,6 +32,11 @@ final class MDConcDamageTypes implements MDImporterConcordanceListInterface {
     public static function getConcordanceTarget(string $input):MDObjectDamageType {
 
         if (!isset(self::DAMAGE_TYPES[$input])) {
+
+            if (in_array($input, self::DAMAGE_TYPES_BLACKLIST, true)) {
+                throw new MDImporterBlacklistedConcordanceTerm("Invalid damage type: " . $input);
+            }
+
             throw new MDImporterMissingConcordance("Unknown damage type: " . $input);
         }