Add custom exception: UnableToLoadFreeMarkerTemplateException

Author: kobylynskyi

graphql-codegen-gradle-plugin/src/main/java/com/kobylynskyi/graphql/codegen/FreeMarkerTemplatesRegistry.java

@@ -1,5 +1,6 @@
 package com.kobylynskyi.graphql.codegen;
 
+import com.kobylynskyi.graphql.codegen.model.UnableToLoadFreeMarkerTemplateException;
 import freemarker.template.Configuration;
 import freemarker.template.Template;
 import freemarker.template.TemplateExceptionHandler;
@@ -29,7 +30,7 @@ class FreeMarkerTemplatesRegistry {
             interfaceTemplate = configuration.getTemplate("templates/javaClassGraphqlInterface.ftl");
             operationsTemplate = configuration.getTemplate("templates/javaClassGraphqlOperations.ftl");
         } catch (IOException e) {
-            throw new RuntimeException("Unable to load FreeMarker templates", e);
+            throw new UnableToLoadFreeMarkerTemplateException(e);
         }
     }
 }

graphql-codegen-gradle-plugin/src/main/java/com/kobylynskyi/graphql/codegen/model/UnableToLoadFreeMarkerTemplateException.java

@@ -0,0 +1,14 @@
+package com.kobylynskyi.graphql.codegen.model;
+
+/**
+ * Exception that indicates error while loading Apache FreeMarker template
+ *
+ * @author kobylynskyi
+ */
+public class UnableToLoadFreeMarkerTemplateException extends RuntimeException {
+
+    public UnableToLoadFreeMarkerTemplateException(Throwable e) {
+        super("Unable to load FreeMarker templates", e);
+    }
+
+}

graphql-codegen-gradle-plugin/src/main/java/com/kobylynskyi/graphql/codegen/model/UnsupportedGraphqlDefinitionException.java

@@ -3,7 +3,7 @@
 import graphql.language.Definition;
 
 /**
- * Generic exception that indicates some code generation error
+ * Exception that indicates unknown/unsupported GraphQL definition
  *
  * @author kobylynskyi
  */