output: #fixed code
                                  @Override
      public void init(Map<String, String> initParams) {
          String databaseType = null;
          if(initParams.get("databaseType") != null) {
              databaseType = initParams.get("databaseType");
          }
          if (!StringUtils.isEmpty(databaseType) && hasType(databaseType)) {
              String path = "classpath:/database-" + databaseType + ".xml";
              NulsContext.setApplicationContext(new ClassPathXmlApplicationContext(new String[]{path}, true, NulsContext.getApplicationContext()));
          }
      }
input: #vulnerable code 
                                  @Override
      public void init(Map<String, String> initParams) {
          String dataBaseType = null;
          if(initParams.get("dataBaseType") != null) {
              dataBaseType = initParams.get("dataBaseType");
          }
          if (!StringUtils.isEmpty(dataBaseType) && hasType(dataBaseType)) {
              String path = "classpath:/database-" + dataBaseType + ".xml";
              NulsContext.setApplicationContext(new ClassPathXmlApplicationContext(new String[]{path}, true, NulsContext.getApplicationContext()));
          }
      } 
                              #location 7 
                              #vulnerability type NULL_DEREFERENCE