/*
 * Copyright 2017, TeamDev Ltd. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.spine3.server.storage.datastore.type;

import com.google.cloud.datastore.BaseEntity;

/**
 * @author Dmytro Dashenkov
 */
public abstract class AbstractDatastoreColumnType<J, C> implements DatastoreColumnType<J, C> {

    @Override
    public void setNull(BaseEntity.Builder storageRecord, String columnIdentifier) {
        storageRecord.setNull(columnIdentifier);
    }
}

@@ -1119,132 +1119,484 @@
 %0A * 
-@author Dmytro Dashenkov%0A */%0Apublic abstract class AbstractDatastoreColumnType%3CJ, C%3E implements DatastoreColumnType%3CJ, C%3E %7B%0A
+An abstract base for implementing %7B@link DatastoreColumnType%7D.%0A *%0A * %3Cp%3EThis class handles the %7B@code null%7D case, since its implementation is the same for all the types within a Storage%0A * implementation.%0A *%0A * @author Dmytro Dashenkov%0A */%0Apublic abstract class AbstractDatastoreColumnType%3CJ, C%3E implements DatastoreColumnType%3CJ, C%3E %7B%0A%0A    /**%0A     * %7B@inheritDoc%7D%0A     *%0A     * %3Cp%3EDelegates the call to the Datastore-native %7B@link BaseEntity.Builder#setNull setNull%7D.%0A     */
 %0A   

Add some Javadoc.