/**
 *    Copyright 2009-2018 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis.io;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.util.Properties;

import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;

/**
 * @author Clinton Begin
 */
@Deprecated
public class ExternalResources {

  private static final Log log = LogFactory.getLog(ExternalResources.class);

  private ExternalResources() {
    // do nothing
  }

  public static void copyExternalResource(File sourceFile, File destFile) throws IOException {
    if (!destFile.exists()) {
      destFile.createNewFile();
    }

    try (FileChannel source = new FileInputStream(sourceFile).getChannel();
         FileChannel destination = new FileOutputStream(destFile).getChannel()){
      destination.transferFrom(source, 0, source.size());
    }

  }

  public static String getConfiguredTemplate(String templatePath, String templateProperty) throws FileNotFoundException {
    String templateName = "";
    Properties migrationProperties = new Properties();

    try {
      migrationProperties.load(new FileInputStream(templatePath));
      templateName = migrationProperties.getProperty(templateProperty);
    } catch (FileNotFoundException e) {
      throw e;
    } catch (Exception e) {
      log.error("", e);
    }

    return templateName;
  }

}

/**
 *    Copyright 2009-2018 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis.io;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;

import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;

/**
 * @author Clinton Begin
 */
@Deprecated
public class ExternalResources {

  private static final Log log = LogFactory.getLog(ExternalResources.class);

  private ExternalResources() {
    // do nothing
  }

  public static void copyExternalResource(File sourceFile, File destFile) throws IOException {
    if (!destFile.exists()) {
      destFile.createNewFile();
    }

    try (FileInputStream source = new FileInputStream(sourceFile);
         FileOutputStream destination = new FileOutputStream(destFile)) {
      destination.getChannel().transferFrom(source.getChannel(), 0, source.getChannel().size());
    }

  }

  public static String getConfiguredTemplate(String templatePath, String templateProperty) throws FileNotFoundException {
    String templateName = "";
    Properties migrationProperties = new Properties();

    try {
      migrationProperties.load(new FileInputStream(templatePath));
      templateName = migrationProperties.getProperty(templateProperty);
    } catch (FileNotFoundException e) {
      throw e;
    } catch (Exception e) {
      log.error("", e);
    }

    return templateName;
  }

}

Fix suspected memory leak