= Handling Project in Workspace - API provided by ProjectFileHandler class =

=== createProject(String projectName, String description) ===
* creates projectEntry, ''project'' folder, ".project.xml" file and "project_details.xml" file with default content for the project
* returns 
 * projectEntry or 
 * null if projectNameis null (and does not create files or folder)
* throws FileAlreadyExistsException  when ''project'' folder with this name and (or) its ".project.xml" file already exists.
* throws IOException if i/o error happens while writing ".project.xml" file.

=== loadProject(String projectName)===
* reads ".project.xml" file from the ''project'' folder and returns an entry or null if the  name was null
* creates "project_details.xml" file with default values, if this file does not exist
* returns 
 * projectEntry or 
 * null if projectName is null
* throws FileNotFoundException if the ''project'' folder or ".project.xml" file is missing
* throws IOException if one of the existing files could not be read
* throws UnsupportedVersionException if the content of ".project.xml" file has child elements with version that are no longer supported in current version
* throws MissingReaderException if some of the entry cannot be read from the current readers

=== loadPartialProject(String projectName) ===
* loads a project entry (closed project without its children) from the .project.xml file, reads it through ProjectFileReader in partialReadMode
* creates "project_details.xml" file with default values, if this file does not exist
* throws FileNotFoundException if the ''project'' folder or ".project.xml" file is missing
* throws IOException if one of the existing files could not be read

=== saveProject(Entry projectEntry) ===
* It saves ".project.xml" file and "project_details.xml" file with the entry content and re-writes both the files. It creates "project_details.xml" file with default values, if this file does not exist.
* throws FileNotFoundException if the ''project'' folder or ".project.xml" file is missing
* throws IOException if i/o error happens while writing ".project.xml" file.

=== renameEntryInProject(Entry entryToBeRenamed, String newName) ===
* renames entry inside the project with the newName and re-writes the ".project.xml" file
* returns 
 * the renamedEntry or 
 * null (if either entryToBeRenamed is null or newName is null or Empty)
* throws FileNotFoundException if the ''project'' folder or ".project.xml" file is missing
* throws IOException if ".project.xml" file could not be read

=== deleteEntryFromProject(Entry childEntry) ===
* It removes the child entry from the project and re-writes the ".project.xml" file
* throws FileAlreadyExistsException if the ''project'' folder or ".project.xml" file is missing
* throws IOException if ".project.xml" file could not be read

=== deleteEntryFromProject(String projectName, String entryId) ===
* It removes the child entry from the project and re-writes the ".project.xml" file
* throws FileAlreadyExistsException if the ''project'' folder or ".project.xml" file is missing
* throws IOException if ".project.xml" file could not be read