Use Dao inheritance to reduce the amount of boilerplate code

BaseDao.kt

package com.folio3.dotnline.common.data.source.local

import android.arch.persistence.room.Delete
import android.arch.persistence.room.Insert
import android.arch.persistence.room.Update

/**
 * Created by Yousuf Sohail on 4/4/18.
 */
interface BaseDao<T> {

    /**
     * Insert an object in the database.
     *
     * @param obj the object to be inserted.
     */
    @Insert
    fun insert(obj: T)

    /**
     * Insert an array of objects in the database.
     *
     * @param obj the objects to be inserted.
     */
    @Insert
    fun insert(vararg obj: T)

    /**
     * Update an object from the database.
     *
     * @param obj the object to be updated
     */
    @Update
    fun update(obj: T)

    /**
     * Delete an object from the database
     *
     * @param obj the object to be deleted
     */
    @Delete
    fun delete(obj: T)
}