output: #fixed code
                                  @Override
      public synchronized boolean saveRepo(RepoResult repoResult) {
          RepoResult existing = this.getRepoByName(repoResult.getName());
          this.cache.remove(repoResult.getName());
  
          boolean isNew = false;
  
          Connection connection = null;
          PreparedStatement preparedStatement = null;
  
          // Update with new details
          try {
              connection = this.dbConfig.getConnection();
              if (existing != null) {
                  preparedStatement = connection.prepareStatement("UPDATE \"repo\" SET \"name\" = ?, \"scm\" = ?, \"url\" = ?, \"username\" = ?, \"password\" = ?, \"source\" = ?, \"branch\" = ? WHERE  \"name\" = ?");
                  preparedStatement.setString(8, repoResult.getName());
              }
              else {
                  isNew = true;
                  preparedStatement = connection.prepareStatement("INSERT INTO repo(\"name\",\"scm\",\"url\", \"username\", \"password\",\"source\",\"branch\") VALUES (?,?,?,?,?,?,?)");
              }
  
              preparedStatement.setString(1, repoResult.getName());
              preparedStatement.setString(2, repoResult.getScm());
              preparedStatement.setString(3, repoResult.getUrl());
              preparedStatement.setString(4, repoResult.getUsername());
              preparedStatement.setString(5, repoResult.getPassword());
              preparedStatement.setString(6, repoResult.getSource());
              preparedStatement.setString(7, repoResult.getBranch());
  
              preparedStatement.execute();
          }
          catch(SQLException ex) {
              LOGGER.severe(" caught a " + ex.getClass() + "\n with message: " + ex.getMessage());
          }
          finally {
              Helpers.closeQuietly(preparedStatement);
              Helpers.closeQuietly(connection);
          }
  
          this.genericCache.remove(this.repoCountCacheKey);
          this.genericCache.remove(this.repoAllRepoCacheKey);
          return isNew;
      }
input: #vulnerable code 
                                  @Override
      public synchronized boolean saveRepo(RepoResult repoResult) {
          RepoResult existing = this.getRepoByName(repoResult.getName());
          this.cache.remove(repoResult.getName());
  
          boolean isNew = false;
  
          Connection conn = null;
          PreparedStatement stmt = null;
          ResultSet rs = null;
  
          if (existing != null) {
              // Update with new details
              try {
                  conn = this.dbConfig.getConnection();
                  stmt = conn.prepareStatement("UPDATE \"repo\" SET \"name\" = ?, \"scm\" = ?, \"url\" = ?, \"username\" = ?, \"password\" = ?, \"source\" = ?, \"branch\" = ? WHERE  \"name\" = ?");
  
                  stmt.setString(1, repoResult.getName());
                  stmt.setString(2, repoResult.getScm());
                  stmt.setString(3, repoResult.getUrl());
                  stmt.setString(4, repoResult.getUsername());
                  stmt.setString(5, repoResult.getPassword());
                  stmt.setString(6, repoResult.getSource());
                  stmt.setString(7, repoResult.getBranch());
  
                  // Target the row
                  stmt.setString(8, repoResult.getName());
  
                  stmt.execute();
              }
              catch(SQLException ex) {
                  LOGGER.severe(" caught a " + ex.getClass() + "\n with message: " + ex.getMessage());
              }
              finally {
                  Helpers.closeQuietly(rs);
                  Helpers.closeQuietly(stmt);
                  Helpers.closeQuietly(conn);
              }
          }
          else {
              isNew = true;
              try {
                  conn = this.dbConfig.getConnection();
                  stmt = conn.prepareStatement("INSERT INTO repo(\"name\",\"scm\",\"url\", \"username\", \"password\",\"source\",\"branch\") VALUES (?,?,?,?,?,?,?)");
  
                  stmt.setString(1, repoResult.getName());
                  stmt.setString(2, repoResult.getScm());
                  stmt.setString(3, repoResult.getUrl());
                  stmt.setString(4, repoResult.getUsername());
                  stmt.setString(5, repoResult.getPassword());
                  stmt.setString(6, repoResult.getSource());
                  stmt.setString(7, repoResult.getBranch());
  
                  stmt.execute();
              }
              catch(SQLException ex) {
                  LOGGER.severe(" caught a " + ex.getClass() + "\n with message: " + ex.getMessage());
              }
              finally {
                  Helpers.closeQuietly(rs);
                  Helpers.closeQuietly(stmt);
                  Helpers.closeQuietly(conn);
              }
          }
  
          this.genericCache.remove(this.repoCountCacheKey);
          this.genericCache.remove(this.repoAllRepoCacheKey);
          return isNew;
      } 
                              #location 35 
                              #vulnerability type NULL_DEREFERENCE