The plugin reads property and xml files and declaring them as maven project properties:

It as an alternate to properties in pom.xml.

 versions:
  1.0 - reads property files.
  1.0.1 - added support xml files.

Plugin documentation

Goals available:

Goal Description
add-properties-to-project Goal reads property files and declaring the properties as maven project properties.
add-xml-properties-to-project Goal reads xml files and declaring the properties as maven project properties.

From properties file:

Configuration Description
files Contains all the "*.properties" files.
file Contains the path to the ".properties" file.

Sample:

           <project>
              <build>
                  <plugins>
                      <plugin>
                          <groupId>net.sourceforge.properties</groupId>
                          <artifactId>properties-maven-plugin</artifactId>
                          <version>1.0.1-SNAPSHOT</version>
                          <executions>
                              <execution>
                                  <phase>initialize</phase>
                                  <goals>
                                      <goal>add-properties-to-project</goal>
                                  </goals>
                                  <configuration>
                                      <files>
                                          <file>${basedir}/path/name.properties</file>
                                      </files>
                                  </configuration>
                              </execution>
                          </executions>
                      </plugin>
                  </plugins>
              </build>
          </project>

From xml file:

Configuration Description
xmlfiles Contains all the "*.xml" files.
file Contains the path to the ".xml" file.
isCanonicalName Builds a full path to the value. e.g. 
<properties>
   <custom>
      <resource>path</resource>
   </custom>
</properties>
If isCanonicalName="true": custom.resource=path
If isCanonicalName="false": folder=path
Not mandatory. By default use: "false"
spacer Indicates a separator used to separate elements. e.g. custom.folder=path
If the default "." : custom.resource=path
If spacer="-": custom-resource=path
Used only if the isCanonicalName="true".
Not mandatory. By default use: "."

Sample:

           <project>
              <build>
                  <plugins>
                      <plugin>
                          <groupId>net.sourceforge.properties</groupId>
                          <artifactId>properties-maven-plugin</artifactId>
                          <version>1.0.1-SNAPSHOT</version>
                          <executions>
                              <execution>
                                  <phase>initialize</phase>
                                  <goals>
                                      <goal>add-xml-properties-to-project</goal>
                                  </goals>
                                  <configuration>
                                  <isCanonicalName>true</isCanonicalName>
                                  <spacer>.</spacer>
                                      <xmlfiles>
                                          <file>${basedir}/path/name.properties</file>
                                      </xmlfiles>
                                  </configuration>
                              </execution>
                          </executions>
                      </plugin>
                  </plugins>
              </build>
          </project>

Sample name.properties:

 pathServerLog=log
 custom.resource=folder
 …
 prop3=value3

Sample name.xml:

   <properties>
      <pathServerLog>log</pathServerLog>
       …
      <prop3>value3</prop3>
      <custom>
         <resource>path</resource>
      </custom>
   </properties>

Can use:

in pom.xml:

   <build>
      <resources>
         <resource>
            <directory>${basedir}/src/main/custom-resources/${custom.resource}</directory>
            <filtering>true</filtering>
         </resource>
      </resources>
   </build>

folder ${basedir}/src/main/custom-resources/${custom.resource}:
 file1.xml : 

   <server>
      <path>${pathServerLog}<path>
   </server>

multi-module structure sample:

      
      .
      |-- properties-files
      |   |-- src
      |   |   `-- name1.properties
      |   |-- src
      |   |   `-- name2.properties
      |   `-- src
      |       `-- name3.properties
      |-- common-module
      |   |-- pom.xml
      |   `-- src
      |       `-- main
      |           `-- java
      |               `-- test.class
      |-- modules
      |   |-- module_1
      |   |   |-- pom.xml
      |   |   `-- src
      |   |       `-- main
      |   |           `-- java
      |   |               `-- test.class
      |   |-- module_2
      |   |   |-- pom.xml
      |   |   `-- src
      |   |       `-- main
      |   |           `-- java
      |   |               `-- test.class
      |   `-- module_3
      |       |-- pom.xml
      |       `-- src
      |           `-- main
      |               `-- java
      |                   `-- test.class
      |-- pom.xml
      |-- README
      `-- web-module
          |-- pom.xml
          `-- src
              `-- main
                  `-- java
                      `-- test.class