#99 Now handling generated sources gracefully

Creating a placeholder ScmLogInfo object when a source file has been generated.

Author: jimbethancourt

cost-benefit-calculator/src/main/java/org/hjug/cbc/CostBenefitCalculator.java

@@ -248,7 +248,8 @@ <T extends Disharmony> List<ScmLogInfo> getRankedChangeProneness(List<T> disharm
                     } catch (GitAPIException | IOException e) {
                         log.error("Error reading Git repository contents.", e);
                     } catch (NullPointerException e) {
-                        log.error("Encountered nested class in a class containing a violation.  Class: {}", path);
+                        log.info("Encountered nested class in a class containing a violation.  Class: {}", path);
+                        scmLogInfo = new ScmLogInfo(path, 0,0,0);
                     }
                     return scmLogInfo;
                 })